This function returns the spatial point in a trajectory object nearest to the specified geometry object within the specified time range.

Syntax

geometry ST_nearestApproachPoint(trajectory traj, tsrange range, geometry g);
geometry ST_nearestApproachPoint(trajectory traj, timestamp t1, timestamp t2, geometry g);

Parameters

Parameter Description
traj The trajectory object.
t1 The start time.
t2 The end time.
range The time range.
g The specified geometry object.

Examples

Select ST​_nearestApproachPoint(traj, '2010-1-1 13:00:00', '2010-1-1 14:00:00', 'LINESTRING(0 0, 5 5, 9 9)'::geometry) from traj_table;