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| author | Frank Warmerdam <warmerdam@pobox.com> | 1999-03-18 16:34:52 +0000 |
|---|---|---|
| committer | Frank Warmerdam <warmerdam@pobox.com> | 1999-03-18 16:34:52 +0000 |
| commit | 565a4bd035b9d4a83955808efef20f1d8dfa24cf (patch) | |
| tree | 75785fc897708023f1ccdaf40079afcbaaf0fd3a /src/PJ_gall.c | |
| download | PROJ-565a4bd035b9d4a83955808efef20f1d8dfa24cf.tar.gz PROJ-565a4bd035b9d4a83955808efef20f1d8dfa24cf.zip | |
New
git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@776 4e78687f-474d-0410-85f9-8d5e500ac6b2
Diffstat (limited to 'src/PJ_gall.c')
| -rw-r--r-- | src/PJ_gall.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/src/PJ_gall.c b/src/PJ_gall.c new file mode 100644 index 00000000..537c91af --- /dev/null +++ b/src/PJ_gall.c @@ -0,0 +1,22 @@ +#ifndef lint +static const char SCCSID[]="@(#)PJ_gall.c 4.1 94/02/15 GIE REL"; +#endif +#define PJ_LIB__ +#include <projects.h> +PROJ_HEAD(gall, "Gall (Gall Stereographic)") "\n\tCyl, Sph"; +#define YF 1.70710678118654752440 +#define XF 0.70710678118654752440 +#define RYF 0.58578643762690495119 +#define RXF 1.41421356237309504880 +FORWARD(s_forward); /* spheroid */ + xy.x = XF * lp.lam; + xy.y = YF * tan(.5 * lp.phi); + return (xy); +} +INVERSE(s_inverse); /* spheroid */ + lp.lam = RXF * xy.x; + lp.phi = 2. * atan(xy.y * RYF); + return (lp); +} +FREEUP; if (P) pj_dalloc(P); } +ENTRY0(gall) P->es = 0.; P->inv = s_inverse; P->fwd = s_forward; ENDENTRY(P) |