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#define PJ_LIB__
#include <projects.h>
PROJ_HEAD(gins8, "Ginsburg VIII (TsNIIGAiK)") "\n\tPCyl, Sph., no inv.";
#define Cl 0.000952426
#define Cp 0.162388
#define C12 0.08333333333333333
static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */
XY xy = {0.0,0.0};
double t = lp.phi * lp.phi;
(void) P;
xy.y = lp.phi * (1. + t * C12);
xy.x = lp.lam * (1. - Cp * t);
t = lp.lam * lp.lam;
xy.x *= (0.87 - Cl * t * t);
return xy;
}
static void *freeup_new (PJ *P) { /* Destructor */
if (0==P)
return 0;
return pj_dealloc(P);
}
static void freeup (PJ *P) {
freeup_new (P);
return;
}
PJ *PROJECTION(gins8) {
P->es = 0.0;
P->inv = 0;
P->fwd = s_forward;
return P;
}
#ifndef PJ_SELFTEST
int pj_gins8_selftest (void) {return 0;}
#else
int pj_gins8_selftest (void) {
double tolerance_lp = 1e-10;
double tolerance_xy = 1e-7;
char s_args[] = {"+proj=gins8 +a=6400000 +lat_1=0.5 +lat_2=2"};
LP fwd_in[] = {
{ 2, 1},
{ 2,-1},
{-2, 1},
{-2,-1}
};
XY s_fwd_expect[] = {
{ 194350.25093959007, 111703.90763533533},
{ 194350.25093959007, -111703.90763533533},
{-194350.25093959007, 111703.90763533533},
{-194350.25093959007, -111703.90763533533},
};
return pj_generic_selftest (0, s_args, tolerance_xy, tolerance_lp, 4, 4, fwd_in, 0, s_fwd_expect, 0, 0, 0);
}
#endif
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