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
|
#define PJ_LIB__
#include <errno.h>
#include "projects.h"
PROJ_HEAD(kav5, "Kavraisky V") "\n\tPCyl., Sph.";
PROJ_HEAD(qua_aut, "Quartic Authalic") "\n\tPCyl., Sph.";
PROJ_HEAD(fouc, "Foucaut") "\n\tPCyl., Sph.";
PROJ_HEAD(mbt_s, "McBryde-Thomas Flat-Polar Sine (No. 1)") "\n\tPCyl., Sph.";
struct pj_opaque {
double C_x, C_y, C_p;
int tan_mode;
};
static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */
XY xy = {0.0,0.0};
struct pj_opaque *Q = P->opaque;
double c;
xy.x = Q->C_x * lp.lam * cos(lp.phi);
xy.y = Q->C_y;
lp.phi *= Q->C_p;
c = cos(lp.phi);
if (Q->tan_mode) {
xy.x *= c * c;
xy.y *= tan (lp.phi);
} else {
xy.x /= c;
xy.y *= sin (lp.phi);
}
return xy;
}
static LP s_inverse (XY xy, PJ *P) { /* Spheroidal, inverse */
LP lp = {0.0,0.0};
struct pj_opaque *Q = P->opaque;
double c;
xy.y /= Q->C_y;
c = cos (lp.phi = Q->tan_mode ? atan (xy.y) : aasin (P->ctx, xy.y));
lp.phi /= Q->C_p;
lp.lam = xy.x / (Q->C_x * cos(lp.phi));
if (Q->tan_mode)
lp.lam /= c * c;
else
lp.lam *= c;
return lp;
}
static PJ *setup(PJ *P, double p, double q, int mode) {
P->es = 0.;
P->inv = s_inverse;
P->fwd = s_forward;
P->opaque->C_x = q / p;
P->opaque->C_y = p;
P->opaque->C_p = 1/ q;
P->opaque->tan_mode = mode;
return P;
}
PJ *PROJECTION(fouc) {
struct pj_opaque *Q = pj_calloc (1, sizeof (struct pj_opaque));
if (0==Q)
return pj_default_destructor(P, ENOMEM);
P->opaque = Q;
return setup(P, 2., 2., 1);
}
PJ *PROJECTION(kav5) {
struct pj_opaque *Q = pj_calloc (1, sizeof (struct pj_opaque));
if (0==Q)
return pj_default_destructor(P, ENOMEM);
P->opaque = Q;
return setup(P, 1.50488, 1.35439, 0);
}
PJ *PROJECTION(qua_aut) {
struct pj_opaque *Q = pj_calloc (1, sizeof (struct pj_opaque));
if (0==Q)
return pj_default_destructor(P, ENOMEM);
P->opaque = Q;
return setup(P, 2., 2., 0);
}
PJ *PROJECTION(mbt_s) {
struct pj_opaque *Q = pj_calloc (1, sizeof (struct pj_opaque));
if (0==Q)
return pj_default_destructor(P, ENOMEM);
P->opaque = Q;
return setup(P, 1.48875, 1.36509, 0);
}
int pj_fouc_selftest (void) {return 10000;}
int pj_kav5_selftest (void) {return 10000;}
int pj_qua_aut_selftest (void) {return 10000;}
int pj_mbt_s_selftest (void) {return 10000;}
|
