diff options
Diffstat (limited to 'src/PJ_denoy.c')
| -rw-r--r-- | src/PJ_denoy.c | 82 |
1 files changed, 66 insertions, 16 deletions
diff --git a/src/PJ_denoy.c b/src/PJ_denoy.c index b1a6fe80..10005a31 100644 --- a/src/PJ_denoy.c +++ b/src/PJ_denoy.c @@ -1,19 +1,69 @@ #define PJ_LIB__ -#include <projects.h> +#include <projects.h> + PROJ_HEAD(denoy, "Denoyer Semi-Elliptical") "\n\tPCyl., no inv., Sph."; -#define C0 0.95 -#define C1 -.08333333333333333333 -#define C3 .00166666666666666666 -#define D1 0.9 -#define D5 0.03 -FORWARD(s_forward); /* spheroid */ - (void) P; - xy.y = lp.phi; - xy.x = lp.lam; - lp.lam = fabs(lp.lam); - xy.x *= cos((C0 + lp.lam * (C1 + lp.lam * lp.lam * C3)) * - (lp.phi * (D1 + D5 * lp.phi * lp.phi * lp.phi * lp.phi))); - return (xy); + +#define C0 0.95 +#define C1 -0.08333333333333333333 +#define C3 0.00166666666666666666 +#define D1 0.9 +#define D5 0.03 + + +static XY s_forward (LP lp, PJ *P) { /* Spheroidal, forward */ + XY xy = {0.0, 0.0}; + (void) P; + xy.y = lp.phi; + xy.x = lp.lam; + lp.lam = fabs(lp.lam); + xy.x *= cos((C0 + lp.lam * (C1 + lp.lam * lp.lam * C3)) * + (lp.phi * (D1 + D5 * lp.phi * lp.phi * lp.phi * lp.phi))); + return xy; } -FREEUP; if (P) pj_dalloc(P); } -ENTRY0(denoy) P->es = 0.; P->fwd = s_forward; ENDENTRY(P) + + +static void *freeup_new (PJ *P) { /* Destructor */ + return pj_dealloc(P); +} + +static void freeup (PJ *P) { + freeup_new (P); + return; +} + + +PJ *PROJECTION(denoy) { + P->es = 0.0; + P->fwd = s_forward; + + return P; +} + +#ifdef PJ_OMIT_SELFTEST +int pj_denoy_selftest (void) {return 0;} +#else + +int pj_denoy_selftest (void) { + double tolerance_xy = 1e-7; + + char s_args[] = {"+proj=denoy +a=6400000 +lat_1=0.5 +lat_2=2"}; + + LP fwd_in[] = { + { 2, 1}, + { 2,-1}, + {-2, 1}, + {-2,-1} + }; + + XY s_fwd_expect[] = { + { 223377.422876954137, 111701.07212763709}, + { 223377.422876954137, -111701.07212763709}, + {-223377.422876954137, 111701.07212763709}, + {-223377.422876954137, -111701.07212763709}, + }; + + return pj_generic_selftest (0, s_args, tolerance_xy, 0, 4, 4, fwd_in, 0, s_fwd_expect, 0, 0, 0); +} + + +#endif |
