Definition: Spatial index

UN - Geographic Information Systems

A look-up table or structure within a geographic database that is used by a GIS or database management system to speed up queries, analytical operations and display of spatial features.
Source:
United Nations, "Handbook on Geospatial Infrastructure in Support of Census Activities", Department of Economic and Social Affairs, Statistics Division, Studies in Methods, Series F No. 103, New York, 2009
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