This function returns true if the distance between trajectory objects 1 and 2 within the specified time range is within the reference distance.

Syntax

boolean ST_distanceWithin(trajectory traj1, trajectory traj2, tsrange range, float8 d);
boolean ST_distanceWithin(trajectory traj1, trajectory traj2, timestamp t1, timestamp t2, float8 d);

Parameters

Parameter Description
traj The trajectory object.
t1 The start time.
t2 The end time.
range The time range.
d The reference distance.

Examples

Select ST_distanceWithin((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', 100);