对环境制图中反映数量特征的定点符号法，包括几种连续和分级比率符号、非比率分级符号以及相关内容数量特征的表示进行了具体分析比较。
The paper discusses how to present the quantitative features in environmental map-ping , analyses and compares the presentation of quantitative features of continuous and grading ratio symbols , non-ratio symbols and related contents .
定点符号法