Résumé: Beyond Virtual Reality, 3D Geographical Information Systems should provide efficient spatial analysis tools able to use all capabilities of the third dimension, and a visualization that could operate on the results of queries. To address these issues, this paper presents a fully 3D topological model that was implemented in an object-oriented database management system. That prototype uses a 1 : 5,000 scale database where the problems of abstraction and symbolisation arise, and allows a set of semantic, geometrical and topological queries. The results can be visualized after several transformations on some objects of the database to make them more significant.

Langue: Anglais
Thème Informatique

Mots clés:
Visualisation
Systèmes d'information géographiques
Troisième dimension
Modélisation topologique
modèle 9-Intersection