The selectedpapers are collected intosections on: data modeling, spatial indexing, indexingmechanisms, handling of raster and vector data, spatialdatabase systems, topology, storage management, queryretrieval,knowledge engineering in SDS, and 3-dimensionaldata handling.

Spatial data management in database systems: Research directions.- Realms: A foundation for spatial data types in database systems.- A canonical model for a class of areal spatial objects.- Strong integration of spatial domains and operators in a relational database system.- The transformation technique for spatial objects revisited.- A paging scheme for pointer-based quadtrees.- A hierarchical spatial index for cell complexes.- On optimal multiversion access structures.- Concurrent accesses to R-trees.- A spatial data model and a topological sweep algorithm for map overlay.- An optimal quadtree translation algorithm.- Database support for multidimensional discrete data.- From extensible databases to interoperability between multiple databases and GIS applications.- Interoperability of spatial and attribute data managers: A case study.- GeO2: Why objects in a geographical DBMS?.- A small set of formal topological relationships suitable for end-user interaction.- Qualitative and topological relationships in spatial databases.- Topological relations between regions in ?2 and ?2.- Query- adaptive data space partitioning using variable-size storage clusters.- A storage and access architecture for efficient query processing in spatial database systems.- Query processing of spatial objects: Complexity versus redundancy.- The SEQUOIA 2000 project.- Neighborhood query and analysis with GeoSAL, a spatial database language.- Application of a reciprocal confluence tree unit to similar-picture retrieval.- Deduction and deductive databases for geographic data handling.- Representing expectations in spatial information systems.- Volumes from overlaying 3-D triangulations in parallel.- A declarative, object-oriented interface to a solid modeler.- Indexing on spherical surfacesusing semi-quadcodes.