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#define PJ_LIB__
#include <projects.h>
PROJ_HEAD(mill, "Miller Cylindrical") "\n\tCyl, Sph";
static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */
XY xy = {0.0,0.0};
(void) P;
xy.x = lp.lam;
xy.y = log(tan(M_FORTPI + lp.phi * .4)) * 1.25;
return (xy);
}
static LP s_inverse (XY xy, PJ *P) { /* Spheroidal, inverse */
LP lp = {0.0,0.0};
(void) P;
lp.lam = xy.x;
lp.phi = 2.5 * (atan(exp(.8 * xy.y)) - M_FORTPI);
return (lp);
}
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(mill) {
P->es = 0.;
P->inv = s_inverse;
P->fwd = s_forward;
return P;
}
#ifndef PJ_SELFTEST
int pj_mill_selftest (void) {return 0;}
#else
int pj_mill_selftest (void) {
double tolerance_lp = 1e-10;
double tolerance_xy = 1e-7;
char s_args[] = {"+proj=mill +a=6400000 +lat_1=0.5 +lat_2=2"};
LP fwd_in[] = {
{ 2, 1},
{ 2,-1},
{-2, 1},
{-2,-1}
};
XY s_fwd_expect[] = {
{ 223402.144255274179, 111704.701754393827},
{ 223402.144255274179, -111704.701754396243},
{-223402.144255274179, 111704.701754393827},
{-223402.144255274179, -111704.701754396243},
};
XY inv_in[] = {
{ 200, 100},
{ 200,-100},
{-200, 100},
{-200,-100}
};
LP s_inv_expect[] = {
{ 0.00179049310978382265, 0.000895246554873922024},
{ 0.00179049310978382265, -0.000895246554873922024},
{-0.00179049310978382265, 0.000895246554873922024},
{-0.00179049310978382265, -0.000895246554873922024},
};
return pj_generic_selftest (0, s_args, tolerance_xy, tolerance_lp, 4, 4, fwd_in, 0, s_fwd_expect, inv_in, 0, s_inv_expect);
}
#endif
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