Recognition of Roads in an Urban Map by Using the Topological Road-Network

an urban map, the procedure composes the road-network by searching the roads from each intersection. Next, it In this paper, we propose an experimental method to modifies the road-network by interpreting the original urrecognize roads from an urban map on the basis of the ban map and the network simultaneously with heuristic road-network. The road-network is a conceptual graph knowledges about the urban map. to represent connective relationships among roads. The first step in our recognition procedure is to construct this road-network approximately by the bottom-up method, as an application of image processing techniques. Then, the next step is t o modify and complement this roadnetwork exactly, based on both the heuristic knowledges for urban maps and the consistent/inconsistent interpretations for the road-network itself, from a top-down point of view. Such an approach integrated cooperatively with the top-down and bottom-up methods makes it successful to recognize roa.ds in comparison with many traditional bottom-up oriented approaches. Also, we confirm our approach through some experiments.