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A metadata-based approach to define a standard to visual queries in GIS

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2 Author(s)
Goncalves Soares Elias, V. ; Fed.. Univ. de Pernambuco, Recife, Brazil ; Salgado, A.C.

This article proposes a framework that creates a standard to formulate visual queries in geographical information systems (GIS). The queries use visual elements and visual spatial operators, where each element is represented according to a geographic data visual standard. This standard is proposed to be based on a digital geospatial metadata standard, and based on it we define a new geographic visual query language to be used in GIS. The main objective of the proposed framework is to improve the friendliness of a GIS interface, which is achieved by using pictorial information to build query clauses and by reducing the differences among GIS internal structures, using this visual standard

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Database and Expert Systems Applications, 2000. Proceedings. 11th International Workshop on

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