ST_ZMax method for type ST_Geometry

ST_ZMax method for type ST_Geometry

Retrieves the maximum Z coordinate value of a geometry.

Syntax

geometry-expression.ST_ZMax()

Returns

Remarks

Returns the maximum Z coordinate value of the geometry-expression. This is computed by comparing the Z attribute of all points in the geometry.

Note

If the geometry-expression is an empty geometry (ST_IsEmpty()=1), then this method returns NULL.

Note

By default, ST_ZMax uses the original format for a geometry, if it is available. Otherwise, the internal format is used. For more information about internal and original formats, see STORAGE FORMAT clause, CREATE SPATIAL REFERENCE SYSTEM statement.

See also

Standards and compatibility

Example

Discuss this page in DocCommentXchange.

Copyright © 2010, iAnywhere Solutions, Inc. - SQL Anywhere 12.0.0