SQL Server supports the following aggregate methods as extensions to the static geometry methods of the Open Geospatial Consortium (OGC).
[!NOTE]
These aggregate methods are exposed only in SQL Server They are not exposed in the Microsoft.SqlServer.Types assembly.
For more information on OGC specifications, see the following resources:
OGC Specifications, Simple Feature Access Part 1 - Common Architecture
OGC Specifications, Simple Feature Access Part 2 – SQL Options
OGC Specifications, Geography Markup Language
Extended Methods on Geometry Instances
Extended Static Geometry Methods
OGC Methods on Geometry Instances
OGC Static Geometry Methods