TY - PROGRESS IN GEOGRAPHY A1 - WU He-hai T1 - Research on Extended-Fractal Based Automatic Map Generalization Y1 - 2001-12-24 00:00:00.0 JF - PROGRESS IN GEOGRAPHY JO - PROGRESS IN GEOGRAPHY SP - 14 EP - 28 VL - 20 IS - s1 UR - {https://www.progressingeography.com/EN/10.11820/dlkxjz.2001.s1.002} N1 - 10.11820/dlkxjz.2001.s1.002 ER -