DU Shihong, WANG Qiao, LI Zhijiang. Definitions of Natural-Language Spatial Relations in GIS[J]. Geomatics and Information Science of Wuhan University, 2005, 30(6): 533-538.
Citation: DU Shihong, WANG Qiao, LI Zhijiang. Definitions of Natural-Language Spatial Relations in GIS[J]. Geomatics and Information Science of Wuhan University, 2005, 30(6): 533-538.
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Definitions of Natural-Language Spatial Relations in GIS

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  • The detailed direction relations are proposed to describe the directions related to the interior of spatial objects, such as “east part of a polygon”, “east boundary of a polygon”, etc. Then this paper, integrates the detailed directions with exterior direction relations and topological relations and defines several NLSRs. Finally, based on the NLSRs, a natural spatial query language (NSQL) is formed to retrieve spatial data from spatial databases.
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