diff options
Diffstat (limited to 'src/iso19111/c_api.cpp')
| -rw-r--r-- | src/iso19111/c_api.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/src/iso19111/c_api.cpp b/src/iso19111/c_api.cpp index f4f6e6a2..90a414c6 100644 --- a/src/iso19111/c_api.cpp +++ b/src/iso19111/c_api.cpp @@ -2050,6 +2050,8 @@ PJ *proj_get_ellipsoid(PJ_CONTEXT *ctx, const PJ *obj) { /** \brief Get the horizontal datum from a CRS * + * This function may return a Datum or DatumEnsemble object. + * * The returned object must be unreferenced with proj_destroy() after * use. * It should be used by at most one thread at a time. @@ -7992,6 +7994,9 @@ double proj_coordoperation_get_accuracy(PJ_CONTEXT *ctx, /** \brief Returns the datum of a SingleCRS. * + * If that function returns NULL, @see proj_crs_get_datum_ensemble() to + * potentially get a DatumEnsemble instead. + * * The returned object must be unreferenced with proj_destroy() after * use. * It should be used by at most one thread at a time. @@ -8023,6 +8028,9 @@ PJ *proj_crs_get_datum(PJ_CONTEXT *ctx, const PJ *crs) { /** \brief Returns the datum ensemble of a SingleCRS. * + * If that function returns NULL, @see proj_crs_get_datum() to + * potentially get a Datum instead. + * * The returned object must be unreferenced with proj_destroy() after * use. * It should be used by at most one thread at a time. |