This function returns the spatial point in trajectory object 1 nearest to trajectory object 2 within the specified time range.

Syntax

geometry ST_nearestApproachPoint(trajectory traj1, trajectory traj2);
geometry ST_nearestApproachPoint(trajectory traj1, trajectory traj2,tsrange range);
geometry ST_nearestApproachPoint(trajectory traj1, trajectory traj2, timestamp t1, timestamp t2); 

Parameters

Parameter Description
traj1 Trajectory object 1.
traj2 Trajectory object 2.
t1 The start time.
t2 The end time.
range The time range.

Examples

Select ST_nearestApproachPoint((Select traj from traj_table where id=1), (Select traj from traj_table where id=2), '2010-1-1 13:00:00', '2010-1-1 14:00:00');