datum_npoint_round ensure_route_exists ensure_valid_position geom_to_npoint geom_to_nsegment get_srid_ways MAX_LENGTH_GEOM npoint_as_ewkt npoint_as_hexwkb npoint_as_text npoint_as_wkb npoint_cmp npoint_collinear npoint_eq npoint_from_hexwkb npoint_from_wkb npoint_ge npoint_gt npoint_hash npoint_hash_extended npoint_in npoint_le npoint_lt npoint_make NPOINT_MAXLEN npoint_ne npoint_out npoint_parse npoint_position npoint_round npoint_route npoint_set npoint_set_stbox npoint_srid npoint_timestamptz_set_stbox npoint_timestamptz_to_stbox npoint_to_geom npoint_to_nsegment npoint_to_stbox npoint_tstzspan_set_stbox npoint_tstzspan_to_stbox npoint_wkt_out npointarr_geom npointarr_set_stbox nsegment_cmp nsegment_end_position nsegment_eq nsegment_ge nsegment_gt nsegment_in nsegment_le nsegment_lt nsegment_make NSEGMENT_MAXLEN nsegment_ne nsegment_out nsegment_parse nsegment_round nsegment_route nsegment_set nsegment_set_stbox nsegment_sort_cmp nsegment_srid nsegment_start_position nsegment_to_geom nsegment_to_stbox nsegmentarr_geom nsegmentarr_normalize nsegmentarr_sort route_exists route_geom route_length SQL_MAXLEN SQL_ROUTE_MAXLEN SRID_WAYS WAYS_CSV

ensure_valid_position() bool ensure_valid_position ( double  pos ) Ensure valid position.