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#define PJ_LIB__
#include "projects.h"
PROJ_HEAD(lask, "Laskowski") "\n\tMisc Sph, no inv.";
#define a10 0.975534
#define a12 -0.119161
#define a32 -0.0143059
#define a14 -0.0547009
#define b01 1.00384
#define b21 0.0802894
#define b03 0.0998909
#define b41 0.000199025
#define b23 -0.0285500
#define b05 -0.0491032
static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */
XY xy = {0.0,0.0};
double l2, p2;
(void) P;
l2 = lp.lam * lp.lam;
p2 = lp.phi * lp.phi;
xy.x = lp.lam * (a10 + p2 * (a12 + l2 * a32 + p2 * a14));
xy.y = lp.phi * (b01 + l2 * (b21 + p2 * b23 + l2 * b41) +
p2 * (b03 + p2 * b05));
return xy;
}
PJ *PROJECTION(lask) {
P->fwd = s_forward;
P->es = 0.;
return P;
}
#ifndef PJ_SELFTEST
int pj_lask_selftest (void) {return 0;}
#else
int pj_lask_selftest (void) {
double tolerance_lp = 1e-10;
double tolerance_xy = 1e-7;
char s_args[] = {"+proj=lask +a=6400000 +lat_1=0.5 +lat_2=2"};
LP fwd_in[] = {
{ 2, 1},
{ 2,-1},
{-2, 1},
{-2,-1}
};
XY s_fwd_expect[] = {
{ 217928.275907355128, 112144.32922014239},
{ 217928.275907355128, -112144.32922014239},
{-217928.275907355128, 112144.32922014239},
{-217928.275907355128, -112144.32922014239},
};
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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