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How are spatial indexes used in SQL Server?
A spatial index is another special index type that is built to accommodate adding indexes on columns created using the spatial datatypes geography and geometry. As was the case with an XML index, spatial indexes also require that the database table that you are creating the spatial index on also has a clustered primary key index defined.
What are the tessellation rules for spatial indexes?
For information about the tessellation rules, see Spatial Indexes Overview. Specifies index padding. The default is OFF. Indicates that the percentage of free space that is specified by fillfactor is applied to the intermediate-level pages of the index.
How is a bounding box related to a spatial index?
A bounding box corresponds to some portion of an application’s spatial data. Whether the bounding-box of the index completely contains the data stored in the spatial column, or only contains a portion, is up to the application. Only operations computed on objects that are entirely inside of the bounding box benefit from the spatial index.
Is there an auto grid for spatial indexes?
The GEOMETRY_AUTO_GRID / GEOGRAPHY_AUTO_GRID tessellation scheme options do not populate these columns. sys.spatial_index_tessellations catalog view has NULL values for these columns when the auto grid options are used.
How does the spatial index work in tessellation?
The output of the tessellation process is a set of touched cells that are recorded in the spatial index for the object. By referring to these recorded cells, the spatial index can locate the object in space relative to other objects in the spatial column that are also stored in the index.
How to check The GeoPackage version in SQL?
Note: For maximum interoperability, start your database identifiers (table names, column names, etc.) with a lowercase character and only use lowercase characters, numbers 0-9, and underscores ( _ ). Using a direct SQL interface such as DB Browser is the easiest way to check a GeoPackage version.