item indexingA means of accelerating logical queries and tabular `relates' by creating an index on an item in a database table.
See also item indexing, cross-tile indexing and spatial indexing. index coverage The polygon coverage that describes, and is used as a spatial index for, the tile structure of a layer. Each polygon in an index coverage corresponds to a tile.
Special data structure used in a database to speed searching for records in tables or spatial features in geographic data sets.
ArcInfo supports both spatial and attribute indexes. See also item indexing, cross-tile indexing and spatial indexing.
 See also: Label point, Traverse, Latitude-longitude, RDBMS, Coordinate system
  
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