The geography data type represents data in a round-earth coordinate system. The SQL Server geography data type stores ellipsoidal (round-earth) data, such as GPS latitude and longitude coordinates.
Assembly: Microsoft.SqlServer.Smo (in Microsoft.SqlServer.Smo.dll)
The geography data type is predefined and available in each database. You can create table columns of type geography and operate on geography data just like you would use other system-supplied types.