Map symbols which represent the spatial information is the language of map units, also is the content of visual expression of the basic tools of geographic information.
地图符号是地图表达空间信息的语言单位，是可视化表达地理信息内容的基础工具。
Map symbols which represent the spatial information is the language of map units, also is the content of visual expression of the basic tools of geographic information.
地图符号是地图表达空间信息的语言单位，是可视化表达地理信息内容的基础工具。
应用推荐