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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_fahey.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_fahey.c')
| -rw-r--r-- | src/PJ_fahey.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/PJ_fahey.c b/src/PJ_fahey.c new file mode 100644 index 00000000..f49f7401 --- /dev/null +++ b/src/PJ_fahey.c @@ -0,0 +1,20 @@ +#ifndef lint +static const char SCCSID[]="@(#)PJ_fahey.c 4.1 94/02/15 GIE REL"; +#endif +#define PJ_LIB__ +# include <projects.h> +PROJ_HEAD(fahey, "Fahey") "\n\tPcyl, Sph."; +#define TOL 1e-6 +FORWARD(s_forward); /* spheroid */ + xy.y = 1.819152 * ( xy.x = tan(0.5 * lp.phi) ); + xy.x = 0.819152 * lp.lam * asqrt(1 - xy.x * xy.x); + return (xy); +} +INVERSE(s_inverse); /* spheroid */ + lp.phi = 2. * atan(xy.y /= 1.819152); + lp.lam = fabs(xy.y = 1. - xy.y * xy.y) < TOL ? 0. : + xy.x / (0.819152 * sqrt(xy.y)); + return (lp); +} +FREEUP; if (P) pj_dalloc(P); } +ENTRY0(fahey) P->es = 0.; P->inv = s_inverse; P->fwd = s_forward; ENDENTRY(P) |