【摘要】 地图符号表达制图物体的位置及其性质或量值的功能源于其基本结构。本文论证了地图符号由定位点集D和表达点集B构成的结构特点,根据两类点集在点、线、面地图符号中的存在和差异,给出了新的点、线、面地图符号定义。通过三类地图符号表达功能的分析,阐释了地图符号具有强大的表达功能的结构基础。揭示了地图符号具有定位功能和表达性质特征功能的基本原理。更多还原

【Abstract】 In all maps,two basic elements are location and character.The map symbols are composed of located point set D and expressed point set B.The new definitions of point,line and polygon are introduced according to the existence and difference of the two point sets in this paper.The map symbols have structural base of powerful expressed function through these three kinds of map symbols functions.It shows that the map symbols have the basic principle of location function and express quality.更多还原