Egenhofer,M. Interaction with GIS via Spatial Queries. Journal of Visual Languages and Computing, 1:389-413, 1990.  Home/Search   Document Not in Database   Summary   Related Articles

....the proposed presentation language is given is section 4. Finally, the use of this presentation language within the SPRING environment is presented in section 5. 2. REQUIREMENTS FOR PRESENTATION LANGUAGES A discussion on the specific requirements for presentation languages for GIS is found in [Ege90, Ege94]. Egenhofer suggests that a spatial query should consist of three parts: a) the description of the set of objects to be retrieved. b) a set of display queries, which separate query results into more detailed sets, each to be displayed in an individual format. c) a display description specifying ....

....for spatial data has focused on the aspects of spatial operations and on extensions of SQL which include spatial operations. These ideas, in turn, have led to extensive research on the nature of spatial relationships. For example, formalisms for topological relationships include the 4 intersection [Ege90] and the 9 intersection [EDH94] In [Ege94] SpatialSQL, a spatial query and presentation language, was introduced. Other proposals for query languages based on SQL can be found in [Goh89, Ooi90] An analysis of the issues regarding the use of SQL extensions for GIS query and presentation is given ....

Egenhofer,M. Interaction with GIS via Spatial Queries. Journal of Visual Languages and Computing, 1:389-413, 1990.

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