This topic describes the ST_timeAtCumulativeDistance function. This function is used to compute the point in time at which the cumulative distance that a trajectory object covers starting from a specified position reaches a specified value.


timestamp ST_timeAtCumulativeDistance(trajectory traj, float d);


Parameter Description
traj The trajectory object whose arrival time at a specific distance you want to compute.
d The cumulative distance that the trajectory object covers.


Select ST_timeAtCumulativeDistance(traj, 100.0) from traj_table;