above_npoint_tnpoint above_tnpoint_npoint below_npoint_tnpoint below_tnpoint_npoint left_npoint_tnpoint left_tnpoint_npoint overabove_npoint_tnpoint overabove_tnpoint_npoint overbelow_npoint_tnpoint overbelow_tnpoint_npoint overleft_npoint_tnpoint overleft_tnpoint_npoint overright_npoint_tnpoint overright_tnpoint_npoint right_npoint_tnpoint right_tnpoint_npoint

left_npoint_tnpoint() Datum left_npoint_tnpoint ( PG_FUNCTION_ARGS  ) Returns true if the network point is strictly to the left of the temporal point.