geo_cluster_dbscan geo_cluster_intersecting geo_cluster_kmeans geo_cluster_within geo_collect_garray geo_geo_n geo_makeline_garray geo_num_geos geo_num_points geo_pointarr geo_points geom_array_union geom_boundary geom_buffer geom_centroid geom_convex_hull geom_difference2d geom_intersection2d geom_intersection2d_coll geom_min_bounding_radius geom_shortestline2d geom_shortestline3d geom_unary_union line_interpolate_point line_locate_point line_substring

geo_geo_n() GSERIALIZED * geo_geo_n ( const GSERIALIZED *  gs, int  n  ) Return a copy of the n-th composing geometry of a geometry. Parameters [in] gs Geometry/geography [in] n Number (1-based) Note PostGIS function: LWGEOM_geometryn_collection(PG_FUNCTION_ARGS)