Abstract:Determining an accurate flow direction is a prerequisite for hydrographic analysis and river generalization. For river networks with complex spatial structures and little semantic information, it has always been a difficult and interesting problem to automatically and objectively determine the flow direction of all rivers. In a river network with many estuaries, tributaries may either be "simple tributaries" that are associated only with a single main channel or "bridging tributaries" that link multiple main c… Show more
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