Wilco Vertegaal

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This paper describes the architecture of a truly integrated D GIS The system has two main components an extensible database Postgres and an extensible geographic front end GEO The database is extended with D geometric data types functions and a D access method The implementation of the D visualization is based on the graphics standard PEX The resulting(More)
This paper reviews the authors experience with vector overlay and structuring. He first becomes acquainted with vector-structuring and overlay processing in the development of a forest management GIS, begun almost 20 years ago. After the demise of this system he develops an experimental overlay processing system using plane sweep and adaptive grid(More)
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