1. R. Kasturi et al., “Map data processing in Geographic Information System”, IEEE Computer, pp.13–21, Dec. 1989.
2. G. K. Myers, et al., “Verification-Based Approach for Automated Text and Feature Extraction from Raster-Scanned Maps”, 1st GREC, pp.190–203, 1995.
3. G. Maderlechner and H. Mayer, “Conversion of High Level Information from Scanned Maps into Geographic Information Systems”, 3rd ICDAR, pp.253–256, 1995.
4. M. P. Deseilligny and R. Mariani, “A Three Year Project on Topographic Maps Interpretation”, 2 nd GREC, pp160–167. 1997
5. I. Pitas, Digital Image Processing Algorithm, Prentice Hall, 1993.