This topic describes the ST_Transform function, which transforms a trajectory between spatial references.
Syntax
trajectory ST_Transform(trajectory traj, int srid);Parameters
| Parameter | Description |
|---|---|
| traj | The trajectory that you want to transform. |
| srid | The spatial reference identifier (SRID) of the trajectory in the spatial reference to which you want to transform. |
Note The trajectory can be transformed to the specified spatial reference only when the
trajectory has an SRID.
Example
select ST_Transform('{"trajectory":{"version":1,"type":"STPOINT","leafcount":4,"start_time":"2020-11-03 08:00:00","end_time":"2020-11-03 18:03:20","spatial":"SRID=4326;LINESTRING(114.49211 37.97999,114.49211 37.97521,114.49191 37.98021,124 37)","timeline":["2020-11-03 08:00:00","2020-11-03 08:01:40","2020-11-03 08:03:20","2020-11-03 18:03:20"]}}'::trajectory, 2401);
st_transform
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{"trajectory":{"version":1,"type":"STPOINT","leafcount":4,"start_time":"2020-11-03 08:00:00","end_time":"2020-11-03 18:03:20","spatial":"SRID=2401;LINESTRING(29019418.8397 5025539.47515,29019696.5878 5024992.53808,29019387.9428 5025555.44863,29954166.377 5430882.06455)","timeline":["2020-11-03 08:00:00","2020-11-03 08:01:40","2020-11-03 08:03:20","2020-11-03 18:03:20"]}}
(1 row)