Object-Oriented Approach for Handling Topology in VPF Products

摘要

This paper presents an object-oriented approach for building and maintainingtopology for the Defense Mapping Agency (DMA) Vector Product Format (VPF) databases. VPF utilizes a georelational approach to data organization, which incorporates spatial feature location, attributes and metadata information in a relational framework. The object-oriented approach presented in this paper provides a framework that is more manageable in the event of changes to spatial topology. This approach provides automatic update of topology upon changes to spatial features, enforcement of topological consistency, and direct user interaction in resolving conflicts.