Abstract: Topographic map generalization is very systematic and normative. Smaller scale topographic maps are needed in macroeconomic management and planning of the city, such as 1∶2 000 or 1∶5 000. A re-survey method based on the 1∶500 topographic maps requires a lot of money and time. The methods of generalizing topographic map from large scale 1∶500 to 1∶2 000 was proposed, and the skills in treating essential elements of topographic map in key processes were elaborated in detail. This method could significantly improve the generalization efficiency and save a great deal of time and cost, therefore, it showed theoretical and practical importance on topographic map generalization．

Key words: topographic map, generalization, 1∶500, 1∶2 000, digitalization