point3d_min_dist tgeogpointsegm_distance_turnpt tgeompointsegm_distance_turnpt tinstant_distance tnumberinst_distance

tgeompointsegm_distance_turnpt() int tgeompointsegm_distance_turnpt ( Datum  start1, Datum  end1, Datum  start2, Datum  end2, Datum param  UNUSED, TimestampTz  lower, TimestampTz  upper, TimestampTz *  t1, TimestampTz *  t2  ) Return 1 the timestamp at which two temporal geometry point segments are at the minimum distance. These are the turning points when computing the temporal distance. Parameters [in] start1,end1 Values defining the first segment [in] start2,end2 Values defining the second segment [in] param Additional parameter [in] lower,upper Timestamps defining the segments [out] t1,t2 Note The PostGIS functions lw_dist2d_seg_seg and lw_dist3d_seg_seg cannot be used since they do not take time into consideration and would return, e.g., that the minimum distance between the two following segments [Point(2 2)@t1, Point(1 1)@t2] and [Point(3 1)@t1, Point(1 1)@t2] is at Point(2 2)@t2 instead of Point(1.5 1.5)@(t1 + (t2 - t1)/2). Precondition The segments are not both constants. Postcondition As there is a single turning point, t2 is set to t