This topic describes the ST_ECEFToENU function. This function converts Earth-centered Earth-fixed (ECEF) coordinates to east-north-up (ENU) coordinates.
Syntax
meshgeom ST_ECEFToENU(meshgeom geom, geometry center);Parameters
| Parameter | Description |
|---|---|
| geom | The meshgeom object. |
| center | The centroid of ENU coordinates. The value is in the Point3D format: Longitude and latitude + Altitude (m). |
Description
This function projects the model of ECEF coordinates to ENU coordinates.
The center parameter specifies the reference point of ENU coordinates. The value must be in the Point3D format that is supported by EPSG:4326.
For example, 'SRID=4326;POINT(0 0 0)' specifies a reference point whose latitude, longitude, and altitude are 0. The coordinates represent point POINT(0 0).
Examples
SELECT ST_AsText(ST_ECEFToENU('MESHGEOM(PATCH(POINT(6378137 0 0)))', 'SRID=4326;POINT(0 0 100)'));
---------
MESHGEOM(PATCH(POINT Z (0 0 -100)))