5ROBINSON A H, et al. Elements of Cartography(6th)[ M ]. [ s. l. ] : John Wiley & Sons, Inc, 1996.
6WEIBEL R. Generalization of Spatial Data-principles and Selected Algorithms[ A]. Algorithmic Foundations of Geographic Information Systems [ C ]. Berlin: Springer-Verlag, 1997.
7Rusa A,Markness W A. Strategies for Urban Map Generalization[C]. The 18th International Cartographic Conference,Stockholm, 1997.
8Bader M, Weibel R. Detecting and Resolving Size and Proximity Conflicts in the Generalization of Polygonal Maps[C]. The 18th International Cartographic Conference,Stockholm, 1997.
9STUART S K. Design Considerations for an Artificially In-telligent System [C] // Buttenfied B P, McMaster R B.Map Generalization : Making Rules for Knowledge Repre-sentation. London: Longman, 1991.
10BRASSEL K E, WEIBEL R. A Review and ConceptualFramework of Automated Map Generalization [ J ] . Interna-tional Journal of Geographical Information System, 1988 ,2(3) :229-244.