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
|
/*
** libproj -- library of cartographic projections
**
** Copyright (c) 2003, 2006 Gerald I. Evenden
*/
static const char
LIBPROJ_ID[] = "Id";
/*
** Permission is hereby granted, free of charge, to any person obtaining
** a copy of this software and associated documentation files (the
** "Software"), to deal in the Software without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Software, and to
** permit persons to whom the Software is furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be
** included in all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
** SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/* very loosely based upon DMA code by Bradford W. Drew */
#define PROJ_LIB__
#include <lib_proj.h>
PROJ_HEAD(nzmg, "New Zealand Map Grid") "\n\tfixed Earth";
#define EPSLN 1e-10
#define SEC5_TO_RAD 0.4848136811095359935899141023
#define RAD_TO_SEC5 2.062648062470963551564733573
static PROJ_COMPLEX
bf[] = {
{.7557853228, 0.0},
{.249204646, .003371507},
{-.001541739, .041058560},
{-.10162907, .01727609},
{-.26623489, -.36249218},
{-.6870983, -1.1651967 }};
static double
tphi[] = { 1.5627014243, .5185406398, -.03333098, -.1052906, -.0368594,
.007317, .01220, .00394, -.0013 },
tpsi[] = { .6399175073, -.1358797613, .063294409, -.02526853, .0117879,
-.0055161, .0026906, -.001333, .00067, -.00034 };
#define Nbf 5
#define Ntpsi 9
#define Ntphi 8
FORWARD(e_forward); /* ellipsoid */
PROJ_COMPLEX p;
double *C;
int i;
lp.phi = (lp.phi - P->phi0) * RAD_TO_SEC5;
for (p.r = *(C = tpsi + (i = Ntpsi)); i ; --i)
p.r = *--C + lp.phi * p.r;
p.r *= lp.phi;
p.i = lp.lam;
p = proj_zpoly1(p, bf, Nbf);
xy.x = p.i;
xy.y = p.r;
return xy;
}
INVERSE(e_inverse); /* ellipsoid */
int nn, i;
PROJ_COMPLEX p, f, fp, dp;
double den, *C;
p.r = xy.y;
p.i = xy.x;
for (nn = 20; nn ;--nn) {
f = proj_zpolyd1(p, bf, Nbf, &fp);
f.r -= xy.y;
f.i -= xy.x;
den = fp.r * fp.r + fp.i * fp.i;
p.r += dp.r = -(f.r * fp.r + f.i * fp.i) / den;
p.i += dp.i = -(f.i * fp.r - f.r * fp.i) / den;
if ((fabs(dp.r) + fabs(dp.i)) <= EPSLN)
break;
}
if (nn) {
lp.lam = p.i;
for (lp.phi = *(C = tphi + (i = Ntphi)); i ; --i)
lp.phi = *--C + p.r * lp.phi;
lp.phi = P->phi0 + p.r * lp.phi * SEC5_TO_RAD;
} else
lp.lam = lp.phi = HUGE_VAL;
return lp;
}
FREEUP; if (P) free(P); }
ENTRY0(nzmg)
/* force to International major axis */
P->ra = 1. / (P->a = 6378388.0);
P->lam0 = DEG_TO_RAD * 173.;
P->phi0 = DEG_TO_RAD * -41.;
P->x0 = 2510000.;
P->y0 = 6023150.;
P->inv = e_inverse; P->fwd = e_forward;
ENDENTRY(P)
/*
** Log: proj_nzmg.c
** Revision 3.1 2006/01/11 01:38:18 gie
** Initial
**
*/
|
