m-geometry-data-type.md

title	description	author	ms.author	ms.date	ms.service	ms.subservice	ms.topic	ms.custom	f1_keywords	helpviewer_keywords	dev_langs
M (geometry Data Type)	M (geometry Data Type)	MladjoA	mlandzic	08/03/2017	sql	t-sql	reference	ignite-2024	M (geometry Data Type) M_TSQL	M (geometry Data Type)	TSQL

M (geometry Data Type)

[!INCLUDE SQL Server Azure SQL Database Azure SQL Managed Instance FabricSQLDB]

The M (measure) value of the geometry instance. The semantics of the measure value are user-defined.

Syntax

  
.M  

Arguments

Return Types

[!INCLUDEssNoVersion] type: float

CLR type: SqlDouble

Remarks

The value of this property is 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.

M values are not used in any calculations made by the library and will not be carried through any library calculations.

Examples

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

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

See Also

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