Properties

The following 3D property functions are available:

Function	Description
ST_Is3D	Return 1 if a Geometry has at least one z-coordinate; 0 otherwise
ST_M	Return the m-value of the first coordinate of a Geometry
ST_Z	Return the z-value of the first coordinate of a Geometry
ST_ZMax	Return the maximum z-value of a Geometry
ST_ZMin	Return the minimum z-value of a Geometry

• ST_Is3D
• ST_M
• ST_Z
• ST_ZMax
• ST_ZMin