Color separation of true color map images is always the important content of color image manipulation, and the kernel technology of the map mode recognition and information acquirement.
彩色地图图像分色技术是彩色图像处理的重要内容，是地图模式识别和信息提取的重要技术，研究该项技术对于实现彩色地图快速分色出版具有重要意义。
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。
Using the method of information theory to determine map classification, the quality of map design can be improved, and the in formation content of map can be enriched.
用信息论方法确定地图分级，可提高地图设计质量，使地图的分级信息达到最大。
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