Z (geometry Data Type)

THIS TOPIC APPLIES TO:yesSQL Server (starting with 2008)yesAzure SQL DatabasenoAzure SQL Data Warehouse noParallel Data Warehouse

The Z (elevation) value of the instance. The semantics of the elevation value are user-defined.

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|Applies to: SQL Server ( SQL Server 2008 through current version), Azure SQL Database.|

Syntax


.Z  

Return Types

SQL Server type: float

CLR type: SqlDouble

Remarks

The value of this property will be null if the geometry instance is not a point, as well as for any Point instance for which it is not set.

This property is read-only.

Z-coordinates are not used in any calculations made by the library and is not carried through any library calculations.

Examples

The following example creates a Point instance with Z (elevation) and M (measure) values and uses Z to fetch the Z value of the instance.

DECLARE @g geometry;  
SET @g = geometry::STGeomFromText('POINT(1 2 3 4)', 0);  
SELECT @g.Z;  

See Also

M (geometry Data Type)
AsTextZM (geometry Data Type)
Extended Methods on Geometry Instances