Abstract
Topological relation is the most important spatial relation. Region Connection Calculus (RCC) is a famous representation of topological relations between regions. But RCC and the other theories improved from RCC cannot represent topological relations between enclave and exclave regions well. An extend RCC theory (ERCC) is proposed with the concept of convex hull that can solve the problem. ERCC can describe eleven kinds of relations between complex regions, which is embedded into an ontology in OWL with rules. A rule based reasoning system is designed to reasoning the topological relations with their semantics. The ontology has more abundant description ability and the reasoning system has more powerful reasoning ability with ERCC theory.
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