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<div class="title">BritishNationalGrid.cpp</div> </div>
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<a href="_british_national_grid_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">// CLASSIFICATION: UNCLASSIFIED</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> </div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">/***************************************************************************/</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">/* RSC IDENTIFIER: BRITISH NATIONAL GRID</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * ABSTRACT</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * This component provides conversions between Geodetic coordinates </span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * (latitude and longitude) and British National Grid coordinates.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * ERROR HANDLING</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * This component checks parameters for valid values. If an invalid value</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * is found the error code is combined with the current error code using </span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * the bitwise or. This combining allows multiple error codes to be</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * returned. The possible error codes are:</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * BNG_NO_ERROR : No errors occurred in function</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * BNG_LAT_ERROR : Latitude outside of valid range</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * (49.5 to 61.5 degrees)</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * BNG_LON_ERROR : Longitude outside of valid range</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * (-10.0 to 3.5 degrees)</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * BNG_EASTING_ERROR : Easting outside of valid range</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * (depending on ellipsoid and</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * projection parameters)</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * BNG_NORTHING_ERROR : Northing outside of valid range</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * (depending on ellipsoid and</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * projection parameters)</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * BNG_STRING_ERROR : A BNG string error: string too long,</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * too short, or badly formed</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * BNG_INVALID_AREA_ERROR : Coordinate is outside of valid area</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * BNG_ELLIPSOID_ERROR : Invalid ellipsoid - must be Airy</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * REUSE NOTES</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> * BRITISH NATIONAL GRID is intended for reuse by any application that </span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * performs a British National Grid projection or its inverse.</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * REFERENCES</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * Further information on BRITISH NATIONAL GRID can be found in the </span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * Reuse Manual.</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * BRITISH NATIONAL GRID originated from : </span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * U.S. Army Topographic Engineering Center</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * Geospatial Information Division</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * 7701 Telegraph Road</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * Alexandria, VA 22310-3864</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * LICENSES</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * None apply to this component.</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * RESTRICTIONS</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * BRITISH NATIONAL GRID has no restrictions.</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * ENVIRONMENT</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> * BRITISH NATIONAL GRID was tested and certified in the following </span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * environments:</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * 1. Solaris 2.5 with GCC, version 2.8.1</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * 2. Windows 95 with MS Visual C++, version 6</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> * MODIFICATIONS</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> * Date Description</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> * ---- -----------</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> * 09-06-00 Original Code</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> * 03-02-07 Original C++ Code</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> * 3/23/2011 NGL BAEts28583 Updated for memory leaks in convertToGeodetic </span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> * and convertFromGeodetic. </span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> * 1/19/2016 A. Layne MSP_DR30125 Updated to pass ellipsoid code to </span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> * TransverseMercator </span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> </div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment">/***************************************************************************/</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> * INCLUDES</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#include <ctype.h></span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor">#include <math.h></span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor">#include <string.h></span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor">#include "<a class="code" href="_transverse_mercator_8h.html">TransverseMercator.h</a>"</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="preprocessor">#include "<a class="code" href="_british_national_grid_8h.html">BritishNationalGrid.h</a>"</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="preprocessor">#include "<a class="code" href="_b_n_g_coordinates_8h.html">BNGCoordinates.h</a>"</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="preprocessor">#include "<a class="code" href="_ellipsoid_parameters_8h.html">EllipsoidParameters.h</a>"</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="preprocessor">#include "<a class="code" href="_map_projection_coordinates_8h.html">MapProjectionCoordinates.h</a>"</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="preprocessor">#include "<a class="code" href="_geodetic_coordinates_8h.html">GeodeticCoordinates.h</a>"</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#include "<a class="code" href="_coordinate_conversion_exception_8h.html">CoordinateConversionException.h</a>"</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor">#include "<a class="code" href="_error_messages_8h.html">ErrorMessages.h</a>"</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> </div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> * ctype.h - Standard C character handling library</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> * math.h - Standard C math library</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"> * stdio.h - Standard C input/output library</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"> * string.h - Standard C string handling library</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"> * TransverseMercator.h - Is used to convert transverse mercator coordinates</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> * BritishNationalGrid.h - Is for prototype error checking</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> * BNGCoordinates.h - defines bng coordinates</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> * MapProjectionCoordinates.h - defines map projection coordinates</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> * GeodeticCoordinates.h - defines geodetic coordinates</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> * CoordinateConversionException.h - Exception handler</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> * ErrorMessages.h - Contains exception messages</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> </div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="keyword">using namespace </span>MSP::CCS;</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> </div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment">/***************************************************************************/</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment">/* DEFINES */</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> </div>
<div class="line"><a name="l00121"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a952eac791b596a61bba0a133a3bb439f"> 121</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_m_g_r_s_8cpp.html#a598a3330b3c21701223ee0ca14316eca">PI</a> = 3.14159265358979323e0; <span class="comment">/* PI */</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#aa3c1d8e4403d757bf419703c040db87d"> 122</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_m_g_r_s_8cpp.html#a27d2bea15134ae7c7f7a2d11379bde53">PI_OVER_2</a> = (<a class="code" href="_m_g_r_s_8cpp.html#a598a3330b3c21701223ee0ca14316eca">PI</a> / 2.0e0); <span class="comment">/* PI over 2 */</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a820597b124334bf7fb85214114f4876d"> 123</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_albers_equal_area_conic_8cpp.html#a820597b124334bf7fb85214114f4876d">TWO_PI</a> = (2.0e0 * <a class="code" href="_m_g_r_s_8cpp.html#a598a3330b3c21701223ee0ca14316eca">PI</a>); <span class="comment">/* 2 * PI */</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#aa63b6cd7807c756d972c38009904b2a2"> 124</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_u_t_m_8cpp.html#a7ce12d8a28541150544bc0dfeb789e13">MAX_LAT</a> = (61.5 * <a class="code" href="_m_g_r_s_8cpp.html#a598a3330b3c21701223ee0ca14316eca">PI</a> / 180.0); <span class="comment">/* 61.5 degrees */</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a5c2eb10e4518a484256a89ac8ad6652b"> 125</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_u_t_m_8cpp.html#afb7fd15722eccf2cd90338aac9f88318">MIN_LAT</a> = (49.5 * <a class="code" href="_m_g_r_s_8cpp.html#a598a3330b3c21701223ee0ca14316eca">PI</a> / 180.0); <span class="comment">/* 49.5 degrees */</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#acdd7c4446da82a472220a9ee9e3097d3"> 126</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_british_national_grid_8cpp.html#acdd7c4446da82a472220a9ee9e3097d3">MAX_LON</a> = (3.5 * <a class="code" href="_m_g_r_s_8cpp.html#a598a3330b3c21701223ee0ca14316eca">PI</a> / 180.0); <span class="comment">/* 3.5 degrees */</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a7c8c2d4a945ad57d244f3726bb2aa538"> 127</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_british_national_grid_8cpp.html#a7c8c2d4a945ad57d244f3726bb2aa538">MIN_LON</a> = (-10.0 * <a class="code" href="_m_g_r_s_8cpp.html#a598a3330b3c21701223ee0ca14316eca">PI</a> / 180.0); <span class="comment">/* -10 degrees */</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a7f553b0538311ed68d12ca648bbed836"> 128</a></span> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="_british_national_grid_8cpp.html#a7f553b0538311ed68d12ca648bbed836">BNG500GRID</a> = <span class="stringliteral">"STNOHJ"</span>; <span class="comment">/* 500,000 unit square identifications */</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#abc5ac034fa890c5a551c6dfec3e2f069"> 129</a></span> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="_british_national_grid_8cpp.html#abc5ac034fa890c5a551c6dfec3e2f069">BNG100GRID</a> = <span class="stringliteral">"VWXYZQRSTULMNOPFGHJKABCDE"</span>; <span class="comment">/* 100,000 unit square identifications */</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> </div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment">/* BNG projection Parameters */</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a2971e469331a65386807c117124cd475"> 132</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_british_national_grid_8cpp.html#a2971e469331a65386807c117124cd475">BNG_Origin_Lat</a> = (49.0 * <a class="code" href="_m_g_r_s_8cpp.html#a598a3330b3c21701223ee0ca14316eca">PI</a> / 180.0); <span class="comment">// Latitude of origin, in radians</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#abcaa5cb7694586b82d1b4078a9e735dc"> 133</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_british_national_grid_8cpp.html#abcaa5cb7694586b82d1b4078a9e735dc">BNG_Origin_Long</a> = (-2.0 * <a class="code" href="_m_g_r_s_8cpp.html#a598a3330b3c21701223ee0ca14316eca">PI</a> / 180.0); <span class="comment">// Longitude of origin, in radians</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a2efd731cfbbfa221d8cbedd45759f541"> 134</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_british_national_grid_8cpp.html#a2efd731cfbbfa221d8cbedd45759f541">BNG_False_Northing</a> = -100000.0; <span class="comment">// False northing, in meters</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a65c2d75d0c028856fd65af39af735771"> 135</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_british_national_grid_8cpp.html#a65c2d75d0c028856fd65af39af735771">BNG_False_Easting</a> = 400000.0; <span class="comment">// False easting, in meters</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#ab4534507263dd4154bdaeda533bc75ca"> 136</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_british_national_grid_8cpp.html#ab4534507263dd4154bdaeda533bc75ca">BNG_Scale_Factor</a> = .9996012717; <span class="comment">// Scale factor</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> </div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment">/* Maximum variance for easting and northing values for Airy. */</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a04b1876624c6dd29e29aafdb982fb4d3"> 139</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_british_national_grid_8cpp.html#a04b1876624c6dd29e29aafdb982fb4d3">BNG_Max_Easting</a> = 759961.0;</div>
<div class="line"><a name="l00140"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a8a35fd279d4af2282ba509b6cdd7bb66"> 140</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_british_national_grid_8cpp.html#a8a35fd279d4af2282ba509b6cdd7bb66">BNG_Max_Northing</a> = 1257875.0;</div>
<div class="line"><a name="l00141"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#af54d33a36656c354989836a68f7adfad"> 141</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_british_national_grid_8cpp.html#af54d33a36656c354989836a68f7adfad">BNG_Min_Easting</a> = -133134.0;</div>
<div class="line"><a name="l00142"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a2cae6f62315ac5ae9514486914d173e1"> 142</a></span> <span class="keyword">const</span> <span class="keywordtype">double</span> <a class="code" href="_british_national_grid_8cpp.html#a2cae6f62315ac5ae9514486914d173e1">BNG_Min_Northing</a> = -14829.0;</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> </div>
<div class="line"><a name="l00144"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a37a45327c4d34562b2f956d98edb4cf0"> 144</a></span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span>* <a class="code" href="_british_national_grid_8cpp.html#a37a45327c4d34562b2f956d98edb4cf0">Airy</a> = <span class="stringliteral">"AA"</span>;</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment">/************************************************************************/</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment">// LOCAL FUNCTIONS</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> </div>
<div class="line"><a name="l00149"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a2de8ed1eb0419c910eccbc601656382b"> 149</a></span> <span class="keywordtype">void</span> <a class="code" href="_british_national_grid_8cpp.html#a2de8ed1eb0419c910eccbc601656382b">findIndex</a>( <span class="keywordtype">char</span> letter, <span class="keyword">const</span> <span class="keywordtype">char</span>* letterArray, <span class="keywordtype">long</span> *index )</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> { </div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> * The function findIndex searches for a given letter in an array. </span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> * It returns the index of the letter in the array if the letter is found.</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment"> * If the letter is not found, an error code is returned, otherwise</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment"> * BNG_NO_ERROR is returned. </span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"> * letter : Letter being searched for </span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"> * letter_Array : Array being searched </span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"> * index : Index of letter in array </span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  <span class="keywordtype">long</span> i = 0;</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  <span class="keywordtype">long</span> not_Found = 1;</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  <span class="keywordtype">long</span> length = strlen(letterArray);</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  <span class="keywordflow">while</span> ((i < length) && (not_Found))</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  {</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">if</span> (letter == letterArray[i])</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span>  {</div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  *index = i;</div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  not_Found = 0;</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  }</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  i++;</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  }</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  <span class="keywordflow">if</span> (not_Found)</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#ae495751bfa9476c0f4f4c7664cbec2ab">ErrorMessages::bngString</a> );</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> } </div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> </div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> </div>
<div class="line"><a name="l00179"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a3b0adb961b371ccdfef1bd4524439333"> 179</a></span> <span class="keywordtype">long</span> <a class="code" href="_british_national_grid_8cpp.html#a3b0adb961b371ccdfef1bd4524439333">roundBNG</a>( <span class="keywordtype">double</span> value )</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> { </div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment">/* Round value to nearest integer, using standard engineering rule */</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="keywordtype">double</span> ivalue;</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="keywordtype">long</span> ival;</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  <span class="keywordtype">double</span> fraction = modf (value, &ivalue);</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  ival = (long)(ivalue);</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">if</span> ((fraction > 0.5) || ((fraction == 0.5) && (ival%2 == 1)))</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  ival++;</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> </div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span>  <span class="keywordflow">return</span> (ival);</div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> } </div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> </div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> </div>
<div class="line"><a name="l00193"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#ae5cd9bc86aca31c74bd9b97f9cc00bc6"> 193</a></span> <span class="keywordtype">void</span> <a class="code" href="_british_national_grid_8cpp.html#ae5cd9bc86aca31c74bd9b97f9cc00bc6">makeBNGString</a>( <span class="keywordtype">char</span> ltrnum[4], <span class="keywordtype">long</span> easting, <span class="keywordtype">long</span> northing, <span class="keywordtype">char</span>* BNGString, <span class="keywordtype">long</span> precision )</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="comment">/* Construct a BNG string from its component parts */</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> { </div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> </div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  <span class="keywordtype">double</span> divisor;</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordtype">long</span> east;</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordtype">long</span> north;</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <span class="keywordtype">long</span> i;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordtype">long</span> j;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordtype">double</span> unitInterval;</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  i = 0;</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  <span class="keywordflow">for</span> (j = 0; j < 3; j++)</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  BNGString[i++] = ltrnum[j];</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  divisor = pow (10.0, (5.0 - precision));</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  unitInterval = pow (10.0, (<span class="keywordtype">double</span>)precision);</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> </div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  east = <a class="code" href="_british_national_grid_8cpp.html#a3b0adb961b371ccdfef1bd4524439333">roundBNG</a> (easting/divisor);</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="keywordflow">if</span> (east == unitInterval)</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  east -= 1;</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  <span class="keywordflow">if</span> ((precision == 0) && (east == 1))</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  east = 0;</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  i += sprintf (BNGString + i, <span class="stringliteral">"%*.*ld"</span>, precision, precision, east);</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  north = <a class="code" href="_british_national_grid_8cpp.html#a3b0adb961b371ccdfef1bd4524439333">roundBNG</a> (northing/divisor);</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="keywordflow">if</span> (north == unitInterval)</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  north -= 1;</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="keywordflow">if</span> ((precision == 0) && (north == 1))</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  north = 0;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  i += sprintf (BNGString + i, <span class="stringliteral">"%*.*ld"</span>, precision, precision, north);</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> } </div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> </div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> </div>
<div class="line"><a name="l00226"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#adf5143d994b4b52fdc5f851dc3c62b54"> 226</a></span> <span class="keywordtype">bool</span> <a class="code" href="_british_national_grid_8cpp.html#adf5143d994b4b52fdc5f851dc3c62b54">checkOutOfArea</a>( <span class="keywordtype">char</span> BNG500, <span class="keywordtype">char</span> BNG100 )</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> { </div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment"> * The function checkOutOfArea checks if the 500,000 and </span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"> * 100,000 unit square identifications are within the valid area. If</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"> * they are not, an error code is returned, otherwise BNG_NO_ERROR </span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"> * is returned.</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> * BNG500 : 500,000 square unit identification </span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"> * BNG100 : 100,000 square unit identification </span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordtype">bool</span> outOfArea = <span class="keyword">false</span>;</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> </div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordflow">switch</span> (BNG500)</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  {</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="keywordflow">case</span> <span class="charliteral">'S'</span>:</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">switch</span> (BNG100)</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  {</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <span class="keywordflow">case</span> <span class="charliteral">'A'</span>:</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordflow">case</span> <span class="charliteral">'F'</span>:</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  <span class="keywordflow">case</span> <span class="charliteral">'L'</span>:</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  outOfArea = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  }</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <span class="keywordflow">case</span> <span class="charliteral">'N'</span>:</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordflow">switch</span> (BNG100)</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  {</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  <span class="keywordflow">case</span> <span class="charliteral">'V'</span>:</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  outOfArea = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  }</div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> </div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  <span class="keywordflow">case</span> <span class="charliteral">'H'</span>:</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="keywordflow">if</span> (BNG100 < <span class="charliteral">'L'</span>)</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  outOfArea = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="keywordflow">case</span> <span class="charliteral">'T'</span>:</div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">switch</span> (BNG100)</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  {</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <span class="keywordflow">case</span> <span class="charliteral">'D'</span>:</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">case</span> <span class="charliteral">'E'</span>:</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  <span class="keywordflow">case</span> <span class="charliteral">'J'</span>:</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  <span class="keywordflow">case</span> <span class="charliteral">'K'</span>:</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">case</span> <span class="charliteral">'O'</span>:</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  <span class="keywordflow">case</span> <span class="charliteral">'P'</span>:</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  <span class="keywordflow">case</span> <span class="charliteral">'T'</span>:</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="keywordflow">case</span> <span class="charliteral">'U'</span>:</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="keywordflow">case</span> <span class="charliteral">'X'</span>:</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keywordflow">case</span> <span class="charliteral">'Y'</span>:</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">case</span> <span class="charliteral">'Z'</span>:</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  outOfArea = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  }</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="keywordflow">case</span> <span class="charliteral">'O'</span>:</div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordflow">switch</span> (BNG100)</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  {</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordflow">case</span> <span class="charliteral">'C'</span>:</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordflow">case</span> <span class="charliteral">'D'</span>:</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keywordflow">case</span> <span class="charliteral">'E'</span>:</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keywordflow">case</span> <span class="charliteral">'J'</span>:</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <span class="keywordflow">case</span> <span class="charliteral">'K'</span>:</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordflow">case</span> <span class="charliteral">'O'</span>:</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  <span class="keywordflow">case</span> <span class="charliteral">'P'</span>:</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  <span class="keywordflow">case</span> <span class="charliteral">'T'</span>:</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span>  <span class="keywordflow">case</span> <span class="charliteral">'U'</span>:</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordflow">case</span> <span class="charliteral">'Y'</span>:</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordflow">case</span> <span class="charliteral">'Z'</span>:</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  outOfArea = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  }</div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">case</span> <span class="charliteral">'J'</span>:</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordflow">switch</span> (BNG100)</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  {</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  <span class="keywordflow">case</span> <span class="charliteral">'L'</span>:</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  <span class="keywordflow">case</span> <span class="charliteral">'M'</span>:</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">case</span> <span class="charliteral">'Q'</span>:</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keywordflow">case</span> <span class="charliteral">'R'</span>:</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">case</span> <span class="charliteral">'V'</span>:</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="keywordflow">case</span> <span class="charliteral">'W'</span>:</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  outOfArea = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  }</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">default</span>:</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span>  outOfArea = <span class="keyword">true</span>;</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  }</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> </div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <span class="keywordflow">return</span> outOfArea;</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> } </div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> </div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span> </div>
<div class="line"><a name="l00334"></a><span class="lineno"><a class="code" href="_british_national_grid_8cpp.html#a6249fbfa24e692d62457c22a25a8812d"> 334</a></span> <span class="keywordtype">void</span> <a class="code" href="_british_national_grid_8cpp.html#a6249fbfa24e692d62457c22a25a8812d">breakBNGString</a>( <span class="keywordtype">char</span>* BNGString, <span class="keywordtype">char</span> letters[3], <span class="keywordtype">double</span>* easting, <span class="keywordtype">double</span>* northing, <span class="keywordtype">long</span>* precision )</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span> { </div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> <span class="comment">/* Break down a BNG string into its component parts */</span></div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> </div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span>  <span class="keywordtype">long</span> i = 0;</div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <span class="keywordtype">long</span> j;</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <span class="keywordtype">long</span> num_digits = 0;</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keywordtype">long</span> num_letters;</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="keywordtype">long</span> length = strlen(BNGString);</div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> </div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordflow">while</span> (BNGString[i] == <span class="charliteral">' '</span>)</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  i++; <span class="comment">/* skip any leading blanks */</span></div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  j = i;</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordflow">while</span> (isalpha(BNGString[i]))</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span>  i++;</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  num_letters = i - j;</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <span class="keywordflow">if</span> (num_letters == 2)</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  {</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  <span class="comment">/* get letters */</span></div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  letters[0] = (char)toupper(BNGString[j]);</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  letters[1] = (char)toupper(BNGString[j+1]);</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  letters[2] = 0;</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  }</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#ae495751bfa9476c0f4f4c7664cbec2ab">ErrorMessages::bngString</a> );</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> </div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  <a class="code" href="_british_national_grid_8cpp.html#adf5143d994b4b52fdc5f851dc3c62b54">checkOutOfArea</a>(letters[0], letters[1]);</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keywordflow">while</span> (BNGString[i] == <span class="charliteral">' '</span>)</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  i++;</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  j = i;</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  <span class="keywordflow">if</span> (BNGString[length-1] == <span class="charliteral">' '</span>)</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  length --;</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keywordflow">while</span> (i < length)</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  {</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keywordflow">if</span> (isdigit(BNGString[i]))</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  i++;</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#ae495751bfa9476c0f4f4c7664cbec2ab">ErrorMessages::bngString</a> );</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  }</div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> </div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  num_digits = i - j;</div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="keywordflow">if</span> ((num_digits <= 10) && (num_digits%2 == 0))</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  {</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="keywordtype">long</span> n;</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  <span class="keywordtype">char</span> east_string[6];</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="keywordtype">char</span> north_string[6];</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keywordtype">long</span> east;</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <span class="keywordtype">long</span> north;</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keywordtype">double</span> multiplier;</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span> </div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="comment">/* get easting & northing */</span></div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  n = num_digits / 2;</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  *precision = n;</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  <span class="keywordflow">if</span> (n > 0)</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span>  {</div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  strncpy (east_string, BNGString+j, n);</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  east_string[n] = 0;</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span>  sscanf (east_string, <span class="stringliteral">"%ld"</span>, &east);</div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  strncpy (north_string, BNGString+j+n, n);</div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  north_string[n] = 0;</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  sscanf (north_string, <span class="stringliteral">"%ld"</span>, &north);</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  multiplier = pow (10.0, 5.0 - n);</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  *easting = east * multiplier;</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span>  *northing = north * multiplier;</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  }</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  {</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  *easting = 0.0;</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  *northing = 0.0;</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  }</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  }</div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#ae495751bfa9476c0f4f4c7664cbec2ab">ErrorMessages::bngString</a> );</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span> } </div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span> </div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span> </div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span> <span class="comment">/************************************************************************/</span></div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span> <span class="comment">/* FUNCTIONS </span></div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span> </div>
<div class="line"><a name="l00415"></a><span class="lineno"><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a726b13e0d4dcbf7c883f76a168000fef"> 415</a></span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a726b13e0d4dcbf7c883f76a168000fef">BritishNationalGrid::BritishNationalGrid</a>( <span class="keywordtype">char</span> *ellipsoidCode ) :</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html">CoordinateSystem</a>( 6377563.396, 1 / 299.324964600 ),</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  transverseMercator( 0 ),</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  BNG_Easting( 0.0 ),</div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  BNG_Northing( 0.0 )</div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span> {</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> <span class="comment"> * The constructor receives the ellipsoid code and sets</span></div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span> <span class="comment"> * the corresponding state variables. If any errors occur, an exception is thrown </span></div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span> <span class="comment"> * with a description of the error.</span></div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span> <span class="comment"> * ellipsoidCode : 2-letter code for ellipsoid (input)</span></div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span> </div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  strcpy( BNG_Letters, <span class="stringliteral">"SV"</span> );</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  strcpy( BNG_Ellipsoid_Code, <span class="stringliteral">"AA"</span>);</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span> </div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keywordflow">if</span> ( strcmp( ellipsoidCode, <a class="code" href="_british_national_grid_8cpp.html#a37a45327c4d34562b2f956d98edb4cf0">Airy</a> ) != 0 )</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  { <span class="comment">/* Ellipsoid must be Airy */</span></div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#a118aae65e6d197d7b4fb7e3d6692a498">ErrorMessages::bngEllipsoid</a> );</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  }</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span>  </div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  strcpy( BNG_Ellipsoid_Code, ellipsoidCode );</div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  transverseMercator = <span class="keyword">new</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_transverse_mercator.html">TransverseMercator</a>(</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#ab4b25504df8abc3fb23b5f03eaf6c14e">semiMajorAxis</a>, <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#a103abc45b36f0bc52bd992f2d19bbfc6">flattening</a>, <a class="code" href="_british_national_grid_8cpp.html#abcaa5cb7694586b82d1b4078a9e735dc">BNG_Origin_Long</a>, <a class="code" href="_british_national_grid_8cpp.html#a2971e469331a65386807c117124cd475">BNG_Origin_Lat</a>,</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  <a class="code" href="_british_national_grid_8cpp.html#a65c2d75d0c028856fd65af39af735771">BNG_False_Easting</a>, <a class="code" href="_british_national_grid_8cpp.html#a2efd731cfbbfa221d8cbedd45759f541">BNG_False_Northing</a>, <a class="code" href="_british_national_grid_8cpp.html#ab4534507263dd4154bdaeda533bc75ca">BNG_Scale_Factor</a>, BNG_Ellipsoid_Code );</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span> }</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span> </div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span> </div>
<div class="line"><a name="l00444"></a><span class="lineno"><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#abd9651f93352cdacb07690b171a159b9"> 444</a></span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a726b13e0d4dcbf7c883f76a168000fef">BritishNationalGrid::BritishNationalGrid</a>( <span class="keyword">const</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html">BritishNationalGrid</a> &bng )</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span> {</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  transverseMercator = <span class="keyword">new</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_transverse_mercator.html">TransverseMercator</a>( *( bng.transverseMercator ) );</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#ab4b25504df8abc3fb23b5f03eaf6c14e">semiMajorAxis</a> = bng.<a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#ab4b25504df8abc3fb23b5f03eaf6c14e">semiMajorAxis</a>;</div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#a103abc45b36f0bc52bd992f2d19bbfc6">flattening</a> = bng.<a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#a103abc45b36f0bc52bd992f2d19bbfc6">flattening</a>;</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  BNG_Easting = bng.BNG_Easting; </div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  BNG_Northing = bng.BNG_Northing; </div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span> }</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span> </div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span> </div>
<div class="line"><a name="l00454"></a><span class="lineno"><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#aa14a56db9e95627feb80114d66306286"> 454</a></span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#aa14a56db9e95627feb80114d66306286">BritishNationalGrid::~BritishNationalGrid</a>()</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span> {</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="keyword">delete</span> transverseMercator;</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  transverseMercator = 0;</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span> }</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span> </div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span> </div>
<div class="line"><a name="l00461"></a><span class="lineno"><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a8d0a32c22b40bf2bdadf9fd969d9fe12"> 461</a></span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html">BritishNationalGrid</a>& <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a8d0a32c22b40bf2bdadf9fd969d9fe12">BritishNationalGrid::operator=</a>( <span class="keyword">const</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html">BritishNationalGrid</a> &bng )</div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span> {</div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  <span class="keywordflow">if</span>( <span class="keyword">this</span> != &bng )</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span>  {</div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  transverseMercator->operator=( *bng.transverseMercator );</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#ab4b25504df8abc3fb23b5f03eaf6c14e">semiMajorAxis</a> = bng.<a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#ab4b25504df8abc3fb23b5f03eaf6c14e">semiMajorAxis</a>;</div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#a103abc45b36f0bc52bd992f2d19bbfc6">flattening</a> = bng.<a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#a103abc45b36f0bc52bd992f2d19bbfc6">flattening</a>;</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  BNG_Easting = bng.BNG_Easting; </div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  BNG_Northing = bng.BNG_Northing; </div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  }</div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span> </div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keywordflow">return</span> *<span class="keyword">this</span>;</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span> }</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span> </div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span> </div>
<div class="line"><a name="l00476"></a><span class="lineno"><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#ab242f84c21f4d104e690be7a23f37aef"> 476</a></span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_ellipsoid_parameters.html">EllipsoidParameters</a>* <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#ab242f84c21f4d104e690be7a23f37aef">BritishNationalGrid::getParameters</a>()<span class="keyword"> const</span></div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span> <span class="keyword"></span>{</div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span> <span class="comment">/* </span></div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span> <span class="comment"> * The function getParameters returns the current ellipsoid</span></div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> <span class="comment"> * code.</span></div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span> <span class="comment"> * ellipsoidCode : 2-letter code for ellipsoid (output)</span></div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span> </div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_ellipsoid_parameters.html">EllipsoidParameters</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#ab4b25504df8abc3fb23b5f03eaf6c14e">semiMajorAxis</a>, <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_system.html#a103abc45b36f0bc52bd992f2d19bbfc6">flattening</a>, (<span class="keywordtype">char</span>*)BNG_Ellipsoid_Code );</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span> }</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span> </div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span> </div>
<div class="line"><a name="l00489"></a><span class="lineno"><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a12065c948ed18d8936c2b286aa3c5fc4"> 489</a></span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_b_n_g_coordinates.html">MSP::CCS::BNGCoordinates</a>* <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a12065c948ed18d8936c2b286aa3c5fc4">BritishNationalGrid::convertFromGeodetic</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_geodetic_coordinates.html">MSP::CCS::GeodeticCoordinates</a>* geodeticCoordinates, <span class="keywordtype">long</span> precision )</div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span> {</div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span> <span class="comment"> * The function convertFromGeodetic converts geodetic (latitude and</span></div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span> <span class="comment"> * longitude) coordinates to a BNG coordinate string, according to the </span></div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> <span class="comment"> * current ellipsoid parameters. If any errors occur, an exception is thrown </span></div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="comment"> * with a description of the error.</span></div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> <span class="comment"> * longitude : Longitude, in radians (input)</span></div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span> <span class="comment"> * latitude : Latitude, in radians (input)</span></div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span> <span class="comment"> * precision : Precision level of BNG string (input)</span></div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span> <span class="comment"> * BNGString : British National Grid coordinate string (output)</span></div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span> </div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span>  <span class="keywordtype">double</span> TMEasting, TMNorthing;</div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span> </div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span>  <span class="keywordtype">double</span> longitude = geodeticCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_geodetic_coordinates.html#a81b352849684e9910b4001be3fec1b0d">longitude</a>();</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <span class="keywordtype">double</span> latitude = geodeticCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_geodetic_coordinates.html#a4214a0369f1e642e1a446f35b7151108">latitude</a>();</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span> </div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <span class="keywordflow">if</span> ((latitude < <a class="code" href="_u_t_m_8cpp.html#afb7fd15722eccf2cd90338aac9f88318">MIN_LAT</a>) || (latitude > <a class="code" href="_u_t_m_8cpp.html#a7ce12d8a28541150544bc0dfeb789e13">MAX_LAT</a>))</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  { <span class="comment">/* Latitude out of range */</span></div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#a816b9dcb83273fbc1ba1f3c215f26329">ErrorMessages::latitude</a> );</div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  }</div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  <span class="keywordflow">if</span> ((longitude < <a class="code" href="_british_national_grid_8cpp.html#a7c8c2d4a945ad57d244f3726bb2aa538">MIN_LON</a>) || (longitude > <a class="code" href="_british_national_grid_8cpp.html#acdd7c4446da82a472220a9ee9e3097d3">MAX_LON</a>))</div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  { <span class="comment">/* Longitude out of range */</span></div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#aca84764ebfd6a968bae4726c33c4c20b">ErrorMessages::longitude</a> );</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  }</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span> </div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html">MapProjectionCoordinates</a>* transverseMercatorCoordinates =</div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  transverseMercator-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_transverse_mercator.html#ad4db6e84b2dd477a88e1b7fece500912">convertFromGeodetic</a>( geodeticCoordinates );</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span> </div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  TMEasting = transverseMercatorCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html#a96f2d51e11a3b0b7175e220f9617b16e">easting</a>();</div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  TMNorthing = transverseMercatorCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html#aea94abfb2ad8c80adbbeb7ad1de08720">northing</a>();</div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span> </div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  <span class="keywordflow">if</span> ((TMEasting < 0.0) && (TMEasting > -2.0))</div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  transverseMercatorCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html#a9797087c2cdede46d36eeb013f7a3a90">setEasting</a>( 0.0 );</div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  <span class="keywordflow">if</span> ((TMNorthing < 0.0) && (TMNorthing > -2.0))</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  transverseMercatorCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html#a35267a414365688f98dd0c89be404864">setNorthing</a>( 0.0 );</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span> </div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  TMEasting = transverseMercatorCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html#a96f2d51e11a3b0b7175e220f9617b16e">easting</a>();</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  TMNorthing = transverseMercatorCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html#aea94abfb2ad8c80adbbeb7ad1de08720">northing</a>();</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span> </div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span>  <span class="keywordflow">if</span> ((TMEasting < <a class="code" href="_british_national_grid_8cpp.html#af54d33a36656c354989836a68f7adfad">BNG_Min_Easting</a>) || (TMEasting > <a class="code" href="_british_national_grid_8cpp.html#a04b1876624c6dd29e29aafdb982fb4d3">BNG_Max_Easting</a>))</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span>  {</div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span>  <span class="keyword">delete</span> transverseMercatorCoordinates;</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#ae2e3c8dd1e3e61d274a08769ebad4e32">ErrorMessages::invalidArea</a> );</div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  }</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <span class="keywordflow">if</span> ((TMNorthing < <a class="code" href="_british_national_grid_8cpp.html#a2cae6f62315ac5ae9514486914d173e1">BNG_Min_Northing</a>) || (TMNorthing > <a class="code" href="_british_national_grid_8cpp.html#a8a35fd279d4af2282ba509b6cdd7bb66">BNG_Max_Northing</a>))</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  {</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <span class="keyword">delete</span> transverseMercatorCoordinates;</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#ae2e3c8dd1e3e61d274a08769ebad4e32">ErrorMessages::invalidArea</a> );</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  }</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span> </div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_b_n_g_coordinates.html">BNGCoordinates</a>* bngCoordinates = 0;</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <span class="keywordflow">try</span> {</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span>  bngCoordinates = <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a8390b6922ac8e15d83c4d2520f61345a">convertFromTransverseMercator</a>( transverseMercatorCoordinates, precision );</div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="keyword">delete</span> transverseMercatorCoordinates;</div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  }</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span>  <span class="keywordflow">catch</span> ( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a> e ){</div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  <span class="keyword">delete</span> transverseMercatorCoordinates;</div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span>  <span class="keywordflow">throw</span> e;</div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  }</div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span> </div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  <span class="keywordflow">return</span> bngCoordinates;</div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span> }</div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span> </div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span> </div>
<div class="line"><a name="l00557"></a><span class="lineno"><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#acb273fd60e72b12cb544035a30462591"> 557</a></span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_geodetic_coordinates.html">MSP::CCS::GeodeticCoordinates</a>* <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#acb273fd60e72b12cb544035a30462591">BritishNationalGrid::convertToGeodetic</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_b_n_g_coordinates.html">MSP::CCS::BNGCoordinates</a>* bngCoordinates )</div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span> {</div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span> <span class="comment"> * The function convertToGeodetic converts a BNG coordinate string </span></div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span> <span class="comment"> * to geodetic (latitude and longitude) coordinates, according to the current</span></div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span> <span class="comment"> * ellipsoid parameters. If any errors occur, an exception is thrown </span></div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span> <span class="comment"> * with a description of the error.</span></div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span> <span class="comment"> * BNGString : British National Grid coordinate string (input)</span></div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span> <span class="comment"> * longitude : Longitude, in radians (output)</span></div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span> <span class="comment"> * latitude : Latitude, in radians (output)</span></div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span> <span class="comment"> * </span></div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span> </div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  <span class="keywordtype">double</span> TMEasting, TMNorthing;</div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  <span class="keywordtype">long</span> in_Precision;</div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span> </div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  <span class="keywordtype">char</span>* BNGString = bngCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_b_n_g_coordinates.html#af28d813446364b8260aab7c818b07291">BNGString</a>();</div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  </div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span>  <a class="code" href="_british_national_grid_8cpp.html#a6249fbfa24e692d62457c22a25a8812d">breakBNGString</a>( BNGString, BNG_Letters, &BNG_Easting, &BNG_Northing, &in_Precision );</div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  </div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html">MapProjectionCoordinates</a>* transverseMercatorCoordinates = <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a49bcb33d5b9521e415dc9c2d2378dbdf">convertToTransverseMercator</a>( bngCoordinates );</div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  TMEasting = transverseMercatorCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html#a96f2d51e11a3b0b7175e220f9617b16e">easting</a>();</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  TMNorthing = transverseMercatorCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html#aea94abfb2ad8c80adbbeb7ad1de08720">northing</a>();</div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span> </div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  <span class="keywordflow">if</span> ((TMEasting < <a class="code" href="_british_national_grid_8cpp.html#af54d33a36656c354989836a68f7adfad">BNG_Min_Easting</a>) || (TMEasting > <a class="code" href="_british_national_grid_8cpp.html#a04b1876624c6dd29e29aafdb982fb4d3">BNG_Max_Easting</a>))</div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  {</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keyword">delete</span> transverseMercatorCoordinates;</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#ae2e3c8dd1e3e61d274a08769ebad4e32">ErrorMessages::invalidArea</a> );</div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  }</div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  <span class="keywordflow">if</span> ((TMNorthing < <a class="code" href="_british_national_grid_8cpp.html#a2cae6f62315ac5ae9514486914d173e1">BNG_Min_Northing</a>) || (TMNorthing > <a class="code" href="_british_national_grid_8cpp.html#a8a35fd279d4af2282ba509b6cdd7bb66">BNG_Max_Northing</a>))</div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span>  {</div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  <span class="keyword">delete</span> transverseMercatorCoordinates;</div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#ae2e3c8dd1e3e61d274a08769ebad4e32">ErrorMessages::invalidArea</a> );</div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  }</div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span> </div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_geodetic_coordinates.html">GeodeticCoordinates</a>* geodeticCoordinates = 0;</div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span>  <span class="keywordtype">double</span> latitude;</div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  <span class="keywordtype">double</span> longitude;</div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span>  <span class="keywordflow">try</span> {</div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span>  geodeticCoordinates = transverseMercator-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_transverse_mercator.html#a400ab4fe216b310a7cde17ee86ba2e2f">convertToGeodetic</a>( transverseMercatorCoordinates );</div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  latitude = geodeticCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_geodetic_coordinates.html#a4214a0369f1e642e1a446f35b7151108">latitude</a>();</div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  longitude = geodeticCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_geodetic_coordinates.html#a81b352849684e9910b4001be3fec1b0d">longitude</a>();</div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span>  <span class="keyword">delete</span> transverseMercatorCoordinates;</div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span>  }</div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  <span class="keywordflow">catch</span> ( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a> e ){</div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span>  <span class="keyword">delete</span> transverseMercatorCoordinates;</div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  <span class="keywordflow">throw</span> e;</div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span>  }</div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span> </div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span>  <span class="keywordflow">if</span> ((latitude < <a class="code" href="_u_t_m_8cpp.html#afb7fd15722eccf2cd90338aac9f88318">MIN_LAT</a>) || (latitude > <a class="code" href="_u_t_m_8cpp.html#a7ce12d8a28541150544bc0dfeb789e13">MAX_LAT</a>))</div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  {</div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  <span class="keyword">delete</span> geodeticCoordinates;</div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#ae2e3c8dd1e3e61d274a08769ebad4e32">ErrorMessages::invalidArea</a> );</div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  }</div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  <span class="keywordflow">if</span> ((longitude < <a class="code" href="_british_national_grid_8cpp.html#a7c8c2d4a945ad57d244f3726bb2aa538">MIN_LON</a>) || (longitude > <a class="code" href="_british_national_grid_8cpp.html#acdd7c4446da82a472220a9ee9e3097d3">MAX_LON</a>))</div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  {</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <span class="keyword">delete</span> geodeticCoordinates;</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#ae2e3c8dd1e3e61d274a08769ebad4e32">ErrorMessages::invalidArea</a> );</div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  }</div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span> </div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span>  <span class="keywordflow">return</span> geodeticCoordinates;</div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span> }</div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span> </div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span> </div>
<div class="line"><a name="l00622"></a><span class="lineno"><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a8390b6922ac8e15d83c4d2520f61345a"> 622</a></span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_b_n_g_coordinates.html">MSP::CCS::BNGCoordinates</a>* <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a8390b6922ac8e15d83c4d2520f61345a">BritishNationalGrid::convertFromTransverseMercator</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html">MapProjectionCoordinates</a>* mapProjectionCoordinates, <span class="keywordtype">long</span> precision )</div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span> {</div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span> <span class="comment"> * The function convertFromTransverseMercator converts Transverse Mercator</span></div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span> <span class="comment"> * (easting and northing) coordinates to a BNG coordinate string, according</span></div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span> <span class="comment"> * to the current ellipsoid parameters. If any errors occur, an exception is thrown </span></div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span> <span class="comment"> * with a description of the error.</span></div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span> <span class="comment"> * easting : Easting (X), in meters (input)</span></div>
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span> <span class="comment"> * northing : Northing (Y), in meters (input)</span></div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span> <span class="comment"> * precision : Precision level of BNG string (input)</span></div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span> <span class="comment"> * BNGString : British National Grid coordinate string (output)</span></div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span> </div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  <span class="keywordtype">char</span> letters[4];</div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span>  <span class="keywordtype">long</span> x, y;</div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  <span class="keywordtype">long</span> index;</div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  <span class="keywordtype">long</span> temp_Easting, temp_Northing;</div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <span class="keywordtype">char</span> BNGString[21];</div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span> </div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  <span class="keywordtype">double</span> easting = mapProjectionCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html#a96f2d51e11a3b0b7175e220f9617b16e">easting</a>();</div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <span class="keywordtype">double</span> northing = mapProjectionCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html#aea94abfb2ad8c80adbbeb7ad1de08720">northing</a>();</div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span> </div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  <span class="keywordflow">if</span> ((easting < <a class="code" href="_british_national_grid_8cpp.html#af54d33a36656c354989836a68f7adfad">BNG_Min_Easting</a>) || (easting > <a class="code" href="_british_national_grid_8cpp.html#a04b1876624c6dd29e29aafdb982fb4d3">BNG_Max_Easting</a>))</div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  { <span class="comment">/* Easting out of range */</span></div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#a35b927051eb2143a2fda20693abd3290">ErrorMessages::easting</a> );</div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  }</div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span>  <span class="keywordflow">if</span> ((northing < <a class="code" href="_british_national_grid_8cpp.html#a2cae6f62315ac5ae9514486914d173e1">BNG_Min_Northing</a>) || (northing > <a class="code" href="_british_national_grid_8cpp.html#a8a35fd279d4af2282ba509b6cdd7bb66">BNG_Max_Northing</a>))</div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  { <span class="comment">/* Northing out of range */</span></div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#a31cbb504cb4705337394cdda99b6279c">ErrorMessages::northing</a> );</div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  }</div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span> </div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  temp_Easting = <a class="code" href="_british_national_grid_8cpp.html#a3b0adb961b371ccdfef1bd4524439333">roundBNG</a>(easting);</div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  temp_Northing = <a class="code" href="_british_national_grid_8cpp.html#a3b0adb961b371ccdfef1bd4524439333">roundBNG</a>(northing);</div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span> </div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  temp_Easting += 1000000; </div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  temp_Northing += 500000;</div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span> </div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  x = temp_Easting / 500000;</div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  y = temp_Northing / 500000;</div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span> </div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  index = y * 5 + x;</div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  <span class="keywordflow">if</span> ((index >= 0) && (index < 25))</div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  {</div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  letters[0] = <a class="code" href="_british_national_grid_8cpp.html#abc5ac034fa890c5a551c6dfec3e2f069">BNG100GRID</a>[index];</div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  temp_Easting %= 500000;</div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span>  temp_Northing %= 500000;</div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  x = temp_Easting / 100000;</div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  y = temp_Northing / 100000;</div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  index = y * 5 + x;</div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span>  <span class="keywordflow">if</span> ((index >= 0) && (index < 25))</div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  {</div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  letters[1] = <a class="code" href="_british_national_grid_8cpp.html#abc5ac034fa890c5a551c6dfec3e2f069">BNG100GRID</a>[index];</div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span> </div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span>  <span class="keywordflow">if</span>( <a class="code" href="_british_national_grid_8cpp.html#adf5143d994b4b52fdc5f851dc3c62b54">checkOutOfArea</a>(letters[0], letters[1]) )</div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  {</div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#ae2e3c8dd1e3e61d274a08769ebad4e32">ErrorMessages::invalidArea</a> );</div>
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span>  }</div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span> </div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  letters[2] = <span class="charliteral">' '</span>;</div>
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span>  letters[3] = 0;</div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span>  temp_Easting %= 100000;</div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span>  temp_Northing %= 100000;</div>
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span>  <a class="code" href="_british_national_grid_8cpp.html#ae5cd9bc86aca31c74bd9b97f9cc00bc6">makeBNGString</a>(letters, temp_Easting, temp_Northing, BNGString, precision);</div>
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span>  }</div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span>  {</div>
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  <span class="keywordtype">long</span> five_y = 5 * y;</div>
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  <span class="keywordflow">if</span> ((x >= (25 - five_y)) || (x < -five_y))</div>
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#a35b927051eb2143a2fda20693abd3290">ErrorMessages::easting</a> );</div>
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span>  <span class="keywordflow">if</span> ((five_y >= (25 - x)) || (five_y < -x))</div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span>  {</div>
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#a31cbb504cb4705337394cdda99b6279c">ErrorMessages::northing</a> );</div>
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span>  }</div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span>  }</div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span>  }</div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span>  <span class="keywordflow">else</span></div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  {</div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span>  <span class="keywordtype">long</span> five_y = 5 * y;</div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span>  <span class="keywordflow">if</span> ((x >= (25 - five_y)) || (x < -five_y))</div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#a35b927051eb2143a2fda20693abd3290">ErrorMessages::easting</a> );</div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span>  <span class="keywordflow">if</span> ((five_y >= (25 - x)) || (five_y < -x))</div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  {</div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  <span class="keywordflow">throw</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_conversion_exception.html">CoordinateConversionException</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_error_messages.html#a31cbb504cb4705337394cdda99b6279c">ErrorMessages::northing</a> );</div>
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  }</div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  }</div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span> </div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span>  <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_b_n_g_coordinates.html">BNGCoordinates</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_type.html#a418b669819e988d0cb43c506beffd8eba3f4f617410237dd1fb7703b242c036c0">CoordinateType::britishNationalGrid</a>, BNGString );</div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span> } </div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span> </div>
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span> </div>
<div class="line"><a name="l00713"></a><span class="lineno"><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a49bcb33d5b9521e415dc9c2d2378dbdf"> 713</a></span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html">MSP::CCS::MapProjectionCoordinates</a>* <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_british_national_grid.html#a49bcb33d5b9521e415dc9c2d2378dbdf">BritishNationalGrid::convertToTransverseMercator</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_b_n_g_coordinates.html">MSP::CCS::BNGCoordinates</a>* bngCoordinates )</div>
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span> { </div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span> <span class="comment"> * The function convertToTransverseMercator converts a BNG coordinate string</span></div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span> <span class="comment"> * to Transverse Mercator projection (easting and northing) coordinates </span></div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span> <span class="comment"> * according to the current ellipsoid parameters. If any errors occur, an exception is thrown </span></div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span> <span class="comment"> * with a description of the error.</span></div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span> <span class="comment"> * is returned.</span></div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span> <span class="comment"> * BNGString : British National Grid coordinate string (input)</span></div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span> <span class="comment"> * easting : Easting (X), in meters (output)</span></div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span> <span class="comment"> * northing : Northing (Y), in meters (output)</span></div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span> </div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span>  <span class="keywordtype">long</span> northing_Offset, easting_Offset;</div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span>  <span class="keywordtype">long</span> i = 0;</div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  <span class="keywordtype">long</span> j = 0;</div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  <span class="keywordtype">long</span> in_Precision;</div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span> </div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span>  <span class="keywordtype">char</span>* BNGString = bngCoordinates-><a class="code" href="class_m_s_p_1_1_c_c_s_1_1_b_n_g_coordinates.html#af28d813446364b8260aab7c818b07291">BNGString</a>();</div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span> </div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span>  <a class="code" href="_british_national_grid_8cpp.html#a6249fbfa24e692d62457c22a25a8812d">breakBNGString</a>( BNGString, BNG_Letters, &BNG_Easting, &BNG_Northing, &in_Precision );</div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span> </div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span>  <a class="code" href="_british_national_grid_8cpp.html#a2de8ed1eb0419c910eccbc601656382b">findIndex</a>(BNG_Letters[0], <a class="code" href="_british_national_grid_8cpp.html#a7f553b0538311ed68d12ca648bbed836">BNG500GRID</a>, &i);</div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span> </div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  northing_Offset = 500000 * (i / 2);</div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span>  easting_Offset = 500000 * (i % 2);</div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span> </div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  <a class="code" href="_british_national_grid_8cpp.html#a2de8ed1eb0419c910eccbc601656382b">findIndex</a>(BNG_Letters[1], <a class="code" href="_british_national_grid_8cpp.html#abc5ac034fa890c5a551c6dfec3e2f069">BNG100GRID</a>, &j);</div>
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span> </div>
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  northing_Offset += 100000 * (j / 5);</div>
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  easting_Offset += 100000 * (j % 5);</div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span> </div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  <span class="keywordtype">double</span> easting = BNG_Easting + easting_Offset;</div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  <span class="keywordtype">double</span> northing = BNG_Northing + northing_Offset;</div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span> </div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span>  <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_map_projection_coordinates.html">MapProjectionCoordinates</a>( <a class="code" href="class_m_s_p_1_1_c_c_s_1_1_coordinate_type.html#a418b669819e988d0cb43c506beffd8eba66dcf639c74303ce7a7c90e93ba759f4">CoordinateType::transverseMercator</a>, easting, northing );</div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span> } </div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span> </div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span> </div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span> </div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span> </div>
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span> <span class="comment">// CLASSIFICATION: UNCLASSIFIED</span></div>
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