Title :
Towards a visual query language for an object oriented geographical information system
Author_Institution :
Swedish Defence Res. Establ., Linkoping, Sweden
Abstract :
A query language designed for a geographical information system is described and discussed. The basic map data structure is objected-oriented, homogeneous, and raster-based. Because of the homogeneous map data structure, queries can be applied in a more or less generic way; that is, queries can be applied to all map data structures regardless of their type. The query language design is based on a visual interaction technique that gives a simpler structure compared to conventional query languages. The various types of queries are discussed
Keywords :
geographic information systems; object-oriented databases; query languages; visual programming; homogeneous map data structure; object oriented geographical information system; object oriented map data structure; raster based map data structure; visual interaction; visual query language; Computational Intelligence Society; Data structures; Database languages; Geographic Information Systems; Geology; Information systems; Object oriented databases; Roads; Spatial databases; Visual databases;
Conference_Titel :
Visual Languages, 1990., Proceedings of the 1990 IEEE Workshop on
Conference_Location :
Skokie, IL
Print_ISBN :
0-8186-2090-0
DOI :
10.1109/WVL.1990.128394
