Function spatialite_sys::srid_get_prime_meridian

pub unsafe extern "C" fn srid_get_prime_meridian(
    sqlite: *mut sqlite3, 
    srid: c_int
) -> *mut c_char

checks a SRID definition from the "spatial_ref_sys" table then returning the corresponding Prime Meridian name

\param sqlite handle to current DB connection \param srid the SRID value uniquely identifying the required EPSG definition

\return the Prime Meridian name on succes, NULL on failure

\note you are responsible for freeing the returned name.