大比例尺数字化地形图缩编的方法研究

The generalization method of large scale digital topographic map

地形图缩编是一项系统性、规范性很强的工作。在城市宏观管理和规划中,往往还需要更小比例尺的地形图,如1∶2 000或者1∶5 000。在现有1∶500地形图基础上,若采用重测的方法需要耗费大量的资金和时间。文章论述了由1∶500的地形图缩编至1∶2 000地形图的方法,并详细阐述了其中地形图中各要素缩编的关键过程的处理技巧。该方法可显著地提高缩编过程的效率,节省工作量及大量费用。

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.