大比例尺数字化地形图缩编的方法研究

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。

The generalization method of large scale digital topographic map

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．