Return a temporal pose simplified ensuring that consecutive points are at least a certain distance or time interval apart

minDistSimplify(tpose,mindist float) → tpose
minTimeDeltaSimplify(tpose,mint interval) → tpose

The simplification operates on the trajectory of the points of the temporal pose and preserves the orientation at each surviving instant. The trajectory is simplified in the plane, so a geodetic pose with linear interpolation raises an error. Simplification applies only to temporal sequences or sequence sets with linear interpolation. In all other cases, a copy of the given value is returned.

SELECT asText(minDistSimplify(tpose '[Pose(Point(1 1), 0)@2001-01-01,
  Pose(Point(2 2), 0)@2001-01-02, Pose(Point(3 3), 0)@2001-01-03]', 2));
-- [Pose(POINT(1 1),0)@2001-01-01, Pose(POINT(3 3),0)@2001-01-03]
SELECT asText(minTimeDeltaSimplify(tpose '[Pose(Point(1 1), 0)@2001-01-01,
  Pose(Point(2 2), 0)@2001-01-02, Pose(Point(3 3), 0)@2001-01-04]', interval '2 days'));
-- [Pose(POINT(1 1),0)@2001-01-01, Pose(POINT(3 3),0)@2001-01-04]

Return a temporal pose simplified using the Douglas-Peucker algorithm

maxDistSimplify(tpose,maxdist float,syncdist boolean=true) → tpose
douglasPeuckerSimplify(tpose,maxdist float,syncdist boolean=true) → tpose

The syncdist argument states whether the distance is measured between synchronized instants; when it is false the distance is the spatial one, ignoring time.

SELECT asText(maxDistSimplify(tpose '[Pose(Point(1 1), 0)@2001-01-01,
  Pose(Point(2 1), 0)@2001-01-02, Pose(Point(3 3), 0)@2001-01-03]', 1));
-- [Pose(POINT(1 1),0)@2001-01-01, Pose(POINT(3 3),0)@2001-01-03]
SELECT asText(douglasPeuckerSimplify(tpose '[Pose(Point(1 1), 0)@2001-01-01,
  Pose(Point(2 1), 0)@2001-01-02, Pose(Point(3 3), 0)@2001-01-03]', 1));
-- [Pose(POINT(1 1),0)@2001-01-01, Pose(POINT(3 3),0)@2001-01-03]