sys.spatial_index_tessellations (Transact-SQL)
Represents the information about the tessellation scheme and parameters of each of the spatial indexes.
Note
For information about tessellation, see Spatial Indexing Overview.
Column name |
Data type |
Description |
|---|---|---|
object_id |
int |
ID of the object on which the index is defined. Each (object_id, index_id) pair has a corresponding entry in sys.spatial_indexes. |
index_id |
int |
ID of the spatial index in which the indexed column is defined |
tessellation_scheme |
sysname |
Name of the tessellation scheme, one of: GEOMETRY_GRID GEOGRAPHY_GRID |
bounding_box_xmin |
float(53) |
X-coordinate of the lower-left corner of the bounding box, one of: NULL = Not applicable for a given tessellation scheme (such as GEOGRAPHY_GRID) n = If tessellation_scheme is GEOMETRY_GRID, the x-min coordinate value .gif "Note") Note
The coordinates defined by the bounding box parameters are interpreted for each object according to its Spatial Reference Identifier (SRID).
|
bounding_box_ymin |
float(53) |
Y-coordinate of the lower-left corner of the bounding box, one of: NULL = Not applicable for a given tessellation scheme (such as GEOGRAPHY_GRID) n = If tessellation_scheme is GEOMETRY_GRID, the y-min coordinate value |
bounding_box_xmax |
float(53) |
X-coordinate of the upper-right corner of the bounding box, one of: NULL = Not applicable for a given tessellation scheme (such as GEOGRAPHY_GRID) n = If tessellation_scheme is GEOMETRY_GRID, the x-max coordinate value |
bounding_box_ymax |
float(53) |
Y-coordinate of upper-right corner of the bounding box, one of: NULL = Not applicable for a given tessellation scheme (such as GEOGRAPHY_GRID) n = If tessellation_scheme is GEOMETRY_GRID, the y-max coordinate value |
level_1_grid |
smallint |
Grid density for the top-level grid. If tessellation_scheme is GEOMETRY_GRID or GEOGRAPHY_GRID, one of: 16 = 4 by 4 grid (LOW) 64 = 8 by 8 grid (MEDIUM) 256 = 16 by 16 grid (HIGH) |
level_1_grid_desc |
nvarchar(60) |
Grid density for the top-level grid, one of: LOW MEDIUM HIGH |
level_2_grid |
smallint |
Grid density for the 2nd-level grid. If tessellation_scheme is GEOMETRY_GRID or GEOGRAPHY_GRID, one of: 16 = 4 by 4 grid (LOW) 64 = 8 by 8 grid (MEDIUM) 256 = 16 by 16 grid (HIGH) NULL = Not applicable for given spatial index type or tessellation scheme |
level_2_grid_desc |
nvarchar(60) |
Grid density for the 2nd-level grid, one of: LOW MEDIUM HIGH |
level_3_grid |
smallint |
Grid density for the 3rd-level grid. If tessellation_scheme is GEOMETRY_GRID or GEOGRAPHY_GRID, one of: 16 = 4 by 4 grid (LOW) 64 = 8 by 8 grid (MEDIUM) 256 = 16 by 16 grid (HIGH) NULL = Not applicable for given spatial index type or tessellation scheme |
level_3_grid_desc |
nvarchar(60) |
Grid density for the 3rd-level grid, one of: LOW MEDIUM HIGH |
level_4_grid |
smallint |
Grid density for the 4th-level grid. If tessellation_scheme is GEOMETRY_GRID or GEOGRAPHY_GRID, one of: 16 = 4 by 4 grid (LOW) 64 = 8 by 8 grid (MEDIUM) 256 = 16 by 16 grid (HIGH) NULL = Not applicable for given spatial index type or tessellation scheme |
level_4_grid_desc |
nvarchar(60) |
Grid density for the 4th-level grid, one of: LOW MEDIUM HIGH |
cells_per_object |
int |
Number of cells per spatial object, one of: If tessellation_scheme is GEOMETRY_GRID or GEOGRAPHY_GRID, n = number of cells per object NULL = Not applicable for given spatial index type or tessellation scheme |
Permissions
In SQL Server 2005 and later versions, the visibility of the metadata in catalog views is limited to securables that a user either owns or on which the user has been granted some permission. For more information, see Metadata Visibility Configuration.