The previous chapter introduced an index for a specific data type, XML. That is not the only data type within SQL Server that has a specialized index that caters to the unique needs of the data type. Spatial data, introduced in SQL Server 2008, also comes with specific indexing needs because of the nature of the data stored within.
Spatial data storage advances the storage capabilities of SQL Server into an area that defines shape and location as a specific data type. Before these enhancements, spatial data was often stored as string or numeric values without meaning within the database and required cumbersome conversions ...