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| author | Frank Warmerdam <warmerdam@pobox.com> | 1999-03-18 16:34:52 +0000 |
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| committer | Frank Warmerdam <warmerdam@pobox.com> | 1999-03-18 16:34:52 +0000 |
| commit | 565a4bd035b9d4a83955808efef20f1d8dfa24cf (patch) | |
| tree | 75785fc897708023f1ccdaf40079afcbaaf0fd3a /src/PJ_august.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_august.c')
| -rw-r--r-- | src/PJ_august.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/PJ_august.c b/src/PJ_august.c new file mode 100644 index 00000000..ca870b2f --- /dev/null +++ b/src/PJ_august.c @@ -0,0 +1,21 @@ +#ifndef lint +static const char SCCSID[]="@(#)PJ_august.c 4.1 94/02/15 GIE REL"; +#endif +#define PJ_LIB__ +#include <projects.h> +PROJ_HEAD(august, "August Epicycloidal") "\n\tMisc Sph, no inv."; +#define M 1.333333333333333 +FORWARD(s_forward); /* spheroid */ + double t, c1, c, x1, x12, y1, y12; + + t = tan(.5 * lp.phi); + c1 = sqrt(1. - t * t); + c = 1. + c1 * cos(lp.lam *= .5); + x1 = sin(lp.lam) * c1 / c; + y1 = t / c; + xy.x = M * x1 * (3. + (x12 = x1 * x1) - 3. * (y12 = y1 * y1)); + xy.y = M * y1 * (3. + 3. * x12 - y12); + return (xy); +} +FREEUP; if (P) pj_dalloc(P); } +ENTRY0(august) P->inv = 0; P->fwd = s_forward; P->es = 0.; ENDENTRY(P) |