This topic describes the ST_SetSRID function, which sets the spatial reference identifier (SRID) of a trajectory.
Syntax
trajectory ST_SetSRID(trajectory traj, int srid);Parameters
| Parameter | Description |
|---|---|
| traj | The trajectory whose SRID you want to set. |
| srid | The SRID that you want to set for the trajectory. |
Description
This function sets the SRID of a trajectory to a specified value. However, this function does not change the other information of the trajectory.
Example
select ST_setSRID('{"trajectory":{"version":1,"type":"STPOINT","leafcount":2,"start_time":"2007-05-27 00:00:00","end_time":"2007-05-28 08:36:47.846","spatial":"SRID=4326;LINESTRING(13.43593 52.41721,13.43593 52.41721)","timeline":["2007-05-27 00:00:00","2007-05-28 08:36:47.846"]}}'::trajectory
,4002);
st_setsrid
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
{"trajectory":{"version":1,"type":"STPOINT","leafcount":2,"start_time":"2007-05-27 00:00:00","end_time":"2007-05-28 08:36:48","spatial":"SRID=4002;LINESTRING(13.43593 52.41721,13.43593 52.41721)","timeline":["2007-05-27 00:00:00","2007-05-28 08:36:48"]}}
(1 row)