1. 1) Ablameyko, S., Bereishik, V. and Kryuchkov, A.: Automated Map-Drawing Digitizing Technology Based on Scanner Input, it MVA'94 LAPR Workshop on Machine Vision Applications, pp. 48-51, Dec. 13-15, 1994.
2. 2) Suzuki, S. and Yamada, T.: Maris: Map Recognition Input System, Pattern Recognition, Vol. 23, pp. 919-933, 1990.
3. 3) Boatto, L., Consorti, V., Buono, M., D., Zenzo, S. D., Eramo, V., Esposito, A., Melcarne, F., Meucci, M., Morelli, A., Mosciatti, M., Scarci, S. and Ticci, M.: An Interpretation System for Land Register Maps, IEEE COMPUTER, Vol. 25, No. 7, pp. 25-33, 1992.
4. 4) Kasturi, R., Fernandez, R., Amlani, M. L. and Feng, W.: Map Data Processing in Geographic Information System, IEEE COMPUTER, pp. 10-21, Dec. 1989.
5. 5) Hayakawa, T., Watanabe, T., Yoshida, Y. and Kawaguchi, K.: Extraction of Topological Road-Network from an Urban Map, IEICE D-II, Vol. J74-D-II, No. 6, pp. 757-765, June 1991 (in Japanese).