ST_YMax

ST_YMax returns the maximum second coordinate of an input geometry.

Syntax

ST_YMax(geom)

Arguments

geom

A value of data type GEOMETRY or an expression that evaluates to a GEOMETRY type.

Return type

DOUBLE PRECISION value of the maximum second coordinate.

If geom is empty, then null is returned.

If geom is null, then null is returned.

Examples

The following SQL returns the largest second coordinate of a linestring.

SELECT ST_YMax(ST_GeomFromText('LINESTRING(77.29 29.07,77.42 29.26,77.27 29.31,77.29 29.07)'));

st_ymax
-----------
 29.31