This paper describes an automatic map vectortzation method to obtain geogmphical data from paper maps, for DB-systems using map information, like a GIs. The method consists of component sepamtion, and skeleton vectorization. To obtain accurate vector data, seveml special segmentation techniques and a new skeleton vectorization technique are introduced in the method. The segmentation techniques are used to extract line drawings, character symbols, and other components, such as painted objects, from the original map image. The new skeleton vectorization technique involves a shape reforming process to reform vector shape distortion cawed by raster-to-vector conversion. The process is based on the energy minimization principle. The process has an advantage in regard to reducing the various kinds of distortions, compared with wing conventional processes. Through map input experiments with the method, it was proved that the method can obtain accurate vector data, compared with conventional techniques.

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