geom_from_gml()

Datum geom_from_gml

(

PG_FUNCTION_ARGS

)

Definition at line 97 of file lwgeom_in_gml.c.

{
        GSERIALIZED *geom;
        text *xml_input;
        LWGEOM *lwgeom;
        char *xml;
        int root_srid=SRID_UNKNOWN;
        int xml_size;
 
        /* Get the GML stream */
        if (PG_ARGISNULL(0)) PG_RETURN_NULL();
        xml_input = PG_GETARG_TEXT_P(0);
        xml = text_to_cstring(xml_input);
        xml_size = VARSIZE_ANY_EXHDR(xml_input);
 
        /* Zero for undefined */
        root_srid = PG_GETARG_INT32(1);
 
#if POSTGIS_PROJ_VERSION < 61
        /* Internally lwgeom_from_gml calls gml_reproject_pa which, for PROJ before 6, called GetProj4String.
         * That function requires access to spatial_ref_sys, so in order to have it ready we need to ensure
         * the internal cache is initialized
         */
        postgis_initialize_cache();
#endif
        lwgeom = lwgeom_from_gml(xml, xml_size);
        if ( root_srid != SRID_UNKNOWN )
                lwgeom->srid = root_srid;
 
        geom = geometry_serialize(lwgeom);
        lwgeom_free(lwgeom);
 
        PG_RETURN_POINTER(geom);
}

References lwgeom_free(), lwgeom_from_gml(), LWGEOM::srid, and SRID_UNKNOWN.

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