box2d_to_lwgeom box3d_to_lwgeom geography_valid_type GEOS2POSTGIS gserialized_3Ddistance gserialized_3Dintersects gserialized_array_union gserialized_as_ewkb gserialized_as_ewkt gserialized_as_geojson gserialized_as_hexewkb gserialized_as_text gserialized_azimuth gserialized_boundary gserialized_distance gserialized_dwithin gserialized_dwithin3d gserialized_from_ewkb gserialized_from_geojson gserialized_from_hexewkb gserialized_from_text gserialized_geog_distance gserialized_geog_dwithin gserialized_geog_from_geom gserialized_geog_in gserialized_geog_length gserialized_geog_out gserialized_geography_from_lwgeom gserialized_geom_from_geog gserialized_in gserialized_inter_contains gserialized_intersection gserialized_is_point gserialized_is_poly gserialized_line_interpolate_point gserialized_line_locate_point gserialized_line_substring gserialized_numpoints_linestring gserialized_out gserialized_pointn_linestring gserialized_relate_pattern gserialized_reverse gserialized_shortestline2d gserialized_shortestline3d gserialized_touches lwgeom_line_interpolate_point MOBDB_call_geos MOBDB_point_in_polygon PG_PARSER_ERROR PGIS_FP_TOLERANCE pgis_geography_from_binary pgis_gserialized_same pgis_lwgeom_boundary point_in_multipolygon point_in_polygon POSTGIS2GEOS postgis_valid_typmod srid_check_latlong

gserialized_pointn_linestring() GSERIALIZED * gserialized_pointn_linestring ( const GSERIALIZED *  geom, int  where  ) PointN(GEOMETRY,INTEGER) – find the first linestring in GEOMETRY,. Returns the point at index INTEGER (1 is 1st point). Return NULL if there is no LINESTRING(..) in GEOMETRY or INTEGER is out of bounds.