diff options
| author | Frank Warmerdam <warmerdam@pobox.com> | 2012-02-15 23:51:45 +0000 |
|---|---|---|
| committer | Frank Warmerdam <warmerdam@pobox.com> | 2012-02-15 23:51:45 +0000 |
| commit | b52b9b9cf9a3ae13a29febfb8df574fff1d88027 (patch) | |
| tree | a5d8f9f7ac0c856822382164fa91728bd0d11439 | |
| parent | d0827752041f34a5cff6d03ea2fbf073be54b210 (diff) | |
| download | PROJ-b52b9b9cf9a3ae13a29febfb8df574fff1d88027.tar.gz PROJ-b52b9b9cf9a3ae13a29febfb8df574fff1d88027.zip | |
added pj_get_spheroid_defn() (#142)
git-svn-id: http://svn.osgeo.org/metacrs/proj/trunk@2160 4e78687f-474d-0410-85f9-8d5e500ac6b2
| -rw-r--r-- | ChangeLog | 4 | ||||
| -rw-r--r-- | src/pj_utils.c | 17 | ||||
| -rw-r--r-- | src/proj_api.h | 1 |
3 files changed, 22 insertions, 0 deletions
@@ -1,3 +1,7 @@ +2012-02-15 Frank Warmerdam <warmerdam@pobox.com> + + * src/pj_utils.c: Add pj_get_spheroid_defn() (#142) + 2012-02-08 Frank Warmerdam <warmerdam@pobox.com> * src/pj_apply_gridshift.c: Ensure that one amoung many points diff --git a/src/pj_utils.c b/src/pj_utils.c index 15adcd93..f3d642ad 100644 --- a/src/pj_utils.c +++ b/src/pj_utils.c @@ -154,3 +154,20 @@ PJ *pj_latlong_from_proj( PJ *pj_in ) return pj_init_plus_ctx( pj_in->ctx, defn ); } +/************************************************************************/ +/* pj_get_spheroid_defn() */ +/* */ +/* Fetch the internal definition of the spheroid. Note that */ +/* you can compute "b" from eccentricity_squared as: */ +/* */ +/* b = a * sqrt(1 - es) */ +/************************************************************************/ + +void pj_get_spheroid_defn(projPJ defn, double *major_axis, double *eccentricity_squared) +{ + if ( major_axis ) + *major_axis = defn->a; + + if ( eccentricity_squared ) + *eccentricity_squared = defn->es; +}; diff --git a/src/proj_api.h b/src/proj_api.h index 739a09bd..feae9aff 100644 --- a/src/proj_api.h +++ b/src/proj_api.h @@ -86,6 +86,7 @@ void pj_deallocate_grids(void); void pj_clear_initcache(void); int pj_is_latlong(projPJ); int pj_is_geocent(projPJ); +void pj_get_spheroid_defn(projPJ defn, double *major_axis, double *eccentricity_squared); void pj_pr_list(projPJ); void pj_free(projPJ); void pj_set_finder( const char *(*)(const char *) ); |