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STDimension (geometry Data Type)

Returns the maximum dimension of a geometry instance.


.STDimension ( )

SQL Server return type: int

CLR return type: SqlInt32

STDimension() returns -1 if the geometry instance is empty.

The following example uses STDimension() to create a table variable to hold geometry instances, and inserts a Point, a LineString, and a Polygon.

DECLARE @temp table ([name] varchar(10), [geom] geometry);
INSERT INTO @temp values ('Point', geometry::STGeomFromText('POINT(3 3)', 0));
INSERT INTO @temp values ('LineString', geometry::STGeomFromText('LINESTRING(0 0, 3 3)', 0));
INSERT INTO @temp values ('Polygon', geometry::STGeomFromText('POLYGON((0 0, 3 0, 0 3, 0 0))', 0));
SELECT [name], [geom].STDimension() as [dim];
FROM @temp;

The example then returns the dimensions of each geometry instance.

name

dim

Point

0

LineString

1

Polygon

2

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