1. Editorial

   • Andrew U. Frank

   OriginalPaper Pages: 215 - 217

2. Visibility Computations on Hierarchical Triangulated Terrain Models

   • Leila De Floriani
   • Paola Magillo

   OriginalPaper Pages: 219 - 250

3. Algorithms for Hierarchical Spatial Reasoning

   • Dimitris Papadias
   • Max J. Egenhofer

   OriginalPaper Pages: 251 - 273

4. Qualitative Spatial Representation and Reasoning with the Region Connection Calculus

   • Anthony G. Cohn
   • Brandon Bennett
   • Nicholas Mark Gotts

   OriginalPaper Pages: 275 - 316