This function returns the total length of a trajectory object, in meters.
Syntax
float8 ST_length(trajectory traj, integer srid default 0);
Parameters
Parameter | Description |
---|---|
traj | The trajectory object. |
srid | The spatial reference system identifier (SRID) of the trajectory object. Default value: 0 (4326). |
Description
This function computes the spherical length in meters based on the SRID of the trajectory object. You can specify the SRID for a trajectory object by setting the srid parameter. If not specified, the SRID is 4326 by default.
Examples
select st_length(traj) from traj where id = 2;
st_length
------------------
13494.6660605311
(1 row)