geo_collect_garray geo_makeline_garray geo_npoints geom_array_union geom_boundary geom_buffer geom_centroid geom_convex_hull geom_difference2d geom_intersection2d geom_shortestline2d geom_shortestline3d geom_unary_union line_interpolate_point line_locate_point line_substring

line_substring() GSERIALIZED * line_substring ( const GSERIALIZED *  gs, double  from, double  to  ) Return a subline from a line. Parameters [in] gs Geometry [in] from,to Values in [0,1] representing the fractional locations where the subline starts and ends Note PostGIS function: LWGEOM_line_substring(PG_FUNCTION_ARGS)