Bearing_point_point Bearing_point_tpoint Bearing_tpoint_point Bearing_tpoint_tpoint Tgeo_centroid Tgeo_convex_hull Tgeo_traversed_area Tpoint_angular_difference Tpoint_azimuth Tpoint_cumulative_length Tpoint_direction Tpoint_get_x Tpoint_get_y Tpoint_get_z Tpoint_is_simple Tpoint_length Tpoint_speed Tpoint_trajectory

Tpoint_speed() Datum Tpoint_speed ( PG_FUNCTION_ARGS  ) Return the speed of a temporal point @sqlfn speed()