According to concept of logic and geometrical shape of symbols the represented categories of geographic concepts and their mutual relationships on the basis of symbols of topographic maps are defined and the actual examples are given, which provides for r
According to concept of logic and geometrical shape of symbols the represented categories of geographic concepts and their mutual relationships on the basis of symbols of topographic maps are defined and the actual examples are given, which provides for r
根据逻辑学概念和符号的几何形状，定义了基于地形图符号表达的地理概念的种类及其相互关系，并给出具体实例，为用逻辑方法研究地图语言提供了借鉴意义。