1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<!--Converted with LaTeX2HTML 99.2beta8 (1.46)
original version by: Nikos Drakos, CBLU, University of Leeds
* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan
* with significant contributions from:
Jens Lippmann, Marek Rouchal, Martin Wilck and others -->
<HTML>
<HEAD>
<TITLE>5.4.3 Universal Transverse Mercator UTM (-Ju -JU)</TITLE>
<META NAME="description" CONTENT="5.4.3 Universal Transverse Mercator UTM (-Ju -JU)">
<META NAME="keywords" CONTENT="GMT_Docs">
<META NAME="resource-type" CONTENT="document">
<META NAME="distribution" CONTENT="global">
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=iso-8859-1">
<META NAME="Generator" CONTENT="LaTeX2HTML v99.2beta8">
<META HTTP-EQUIV="Content-Style-Type" CONTENT="text/css">
<LINK REL="STYLESHEET" HREF="GMT_Docs.css">
<LINK REL="next" HREF="node60.html">
<LINK REL="previous" HREF="node58.html">
<LINK REL="up" HREF="node56.html">
<LINK REL="next" HREF="node60.html">
</HEAD>
<BODY bgcolor="#ffffff">
<!--Navigation Panel-->
<A NAME="tex2html1835"
HREF="node60.html">
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.gif"></A>
<A NAME="tex2html1829"
HREF="node56.html">
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.gif"></A>
<A NAME="tex2html1823"
HREF="node58.html">
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.gif"></A>
<A NAME="tex2html1831"
HREF="node1.html">
<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.gif"></A>
<A NAME="tex2html1833"
HREF="node149.html">
<IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index.gif"></A>
<BR>
<B> Next:</B> <A NAME="tex2html1836"
HREF="node60.html">5.4.4 Oblique Mercator (-Jo</A>
<B> Up:</B> <A NAME="tex2html1830"
HREF="node56.html">5.4 Cylindrical Projections</A>
<B> Previous:</B> <A NAME="tex2html1824"
HREF="node58.html">5.4.2 Transverse Mercator (-Jt</A>
  <B> <A NAME="tex2html1832"
HREF="node1.html">Contents</A></B>
  <B> <A NAME="tex2html1834"
HREF="node149.html">Index</A></B>
<BR>
<BR>
<!--End of Navigation Panel-->
<H2><A NAME="SECTION001343000000000000000">
5.4.3 Universal Transverse Mercator UTM (<B>-Ju</B> <B>-JU</B>)</A>
</H2>
<A NAME="7941"></A>
<A NAME="7942"></A>
<A NAME="7943"></A>
<P>
A particular subset of the transverse Mercator is the
Universal Transverse Mercator (UTM) which was adopted
by the US Army for large-scale military maps. Here, the
globe is divided into 60 zones between 84<IMG
WIDTH="11" HEIGHT="15" ALIGN="BOTTOM" BORDER="0"
SRC="img61.gif"
ALT="$^{o}$">S and
84<IMG
WIDTH="11" HEIGHT="15" ALIGN="BOTTOM" BORDER="0"
SRC="img61.gif"
ALT="$^{o}$">N, most of which are 6<IMG
WIDTH="11" HEIGHT="15" ALIGN="BOTTOM" BORDER="0"
SRC="img61.gif"
ALT="$^{o}$"> wide. Each of
these UTM zones have their unique central meridian.
<A NAME="tex2html329"
HREF="http://www.soest.hawaii.edu/gmt"><B>GMT</B></A> implements both the transverse Mercator and the
UTM projection. When selecting UTM you must specify:
<P>
<DL>
<DD><P>
</DD>
<DT><STRONG><IMG
WIDTH="12" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
SRC="img54.gif"
ALT="$\bullet$"></STRONG></DT>
<DD>UTM zone (1-60). Use negative value for zones in the southern hemisphere
<P>
</DD>
<DT><STRONG><IMG
WIDTH="12" HEIGHT="13" ALIGN="BOTTOM" BORDER="0"
SRC="img54.gif"
ALT="$\bullet$"></STRONG></DT>
<DD>Scale along the equator in inch/degree or 1:xxxxx (<B>-Ju</B>), or map width (<B>-JU</B>)
<P>
</DD>
</DL>
<P>
In order to minimize the distortion in any given zone,
a scale factor of 0.9996 has been factored into the formulae.
The scale only varies by 1 part in 1,000 from true scale at
equator. The ellipsoidal projection expressions are accurate for map areas
that extend less than 10<IMG
WIDTH="11" HEIGHT="15" ALIGN="BOTTOM" BORDER="0"
SRC="img61.gif"
ALT="$^{o}$"> away from the central meridian. For
larger regions we use the conformal latitude in the general spherical
formulae instead.
<P>
<A NAME="7944"></A>
<A NAME="7945"></A>
<A NAME="7946"></A>
<P>
<HR>
<!--Navigation Panel-->
<A NAME="tex2html1835"
HREF="node60.html">
<IMG WIDTH="37" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="next" SRC="next.gif"></A>
<A NAME="tex2html1829"
HREF="node56.html">
<IMG WIDTH="26" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="up" SRC="up.gif"></A>
<A NAME="tex2html1823"
HREF="node58.html">
<IMG WIDTH="63" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="previous" SRC="prev.gif"></A>
<A NAME="tex2html1831"
HREF="node1.html">
<IMG WIDTH="65" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="contents" SRC="contents.gif"></A>
<A NAME="tex2html1833"
HREF="node149.html">
<IMG WIDTH="43" HEIGHT="24" ALIGN="BOTTOM" BORDER="0" ALT="index" SRC="index.gif"></A>
<BR>
<B> Next:</B> <A NAME="tex2html1836"
HREF="node60.html">5.4.4 Oblique Mercator (-Jo</A>
<B> Up:</B> <A NAME="tex2html1830"
HREF="node56.html">5.4 Cylindrical Projections</A>
<B> Previous:</B> <A NAME="tex2html1824"
HREF="node58.html">5.4.2 Transverse Mercator (-Jt</A>
  <B> <A NAME="tex2html1832"
HREF="node1.html">Contents</A></B>
  <B> <A NAME="tex2html1834"
HREF="node149.html">Index</A></B>
<!--End of Navigation Panel-->
<ADDRESS>
Paul Wessel
2001-04-18
</ADDRESS>
</BODY>
</HTML>
|
