PostGIS

ST_Y
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ST_Y

8.4. Geometry Accessors

Name

ST_Y — Returns the Y coordinate of a Point.

Synopsis

float +`*`+ST_Y*(`geometry `a_point`)`;

Description

Return the Y coordinate of the point, or NULL if not available. Input must be a point.

To get the minimum and maximum Y value of geometry coordinates use the functions ST_YMin and ST_YMax.

[.inlinemediaobject] check This method implements the OGC Simple Features Implementation Specification for SQL 1.1.

check This method implements the SQL/MM specification. SQL-MM 3: 6.1.4

check This function supports 3d and will not drop the z-index.

Examples

SELECT ST_Y(ST_GeomFromEWKT('POINT(1 2 3 4)'));
 st_y
------
    2
(1 row)

SELECT ST_Y(ST_Centroid(ST_GeomFromEWKT('LINESTRING(1 2 3 4, 1 1 1 1)')));
 st_y
------
  1.5
(1 row)

PostGIS

Name

Synopsis

Description

Examples

See Also