Topological relationships between map geometries

摘要: The importance of topological relationships between spatial objects is recognized in many disciplines. In the field databases, have played an important role, providing mechanisms for constraint specification and indexing techniques. use data a map form has become popular, resulting models such as topologies or, more generally, geometries, which model collections that satisfy certain constraints. However, geometries remain unexplored. this paper, we identify set valid then provide mechanism by they can be directly implemented on top existing systems using regions.