get_managed_object_geometry_from_references(_road_code text, _start_marker_code integer, _start_abscissa real, _end_marker_code integer, _end_abscissa real, _offset real, _side text)

Get the geometry of a managed object from its references, with the functions get_road_point_from_reference for a point (_end_marker_code is NULL) or get_road_substring_from_references for a line. It returns NULL with a warning instead of raising an exception if the geometry cannot be calculated, for example if the end references are before the start references.