第一,区分区域范围,表示空间分布。如世界政区图上,用不同的颜色区分不同国家的领土范围,全国政区图上区分不同省、区范围。第二,区分不同的数量特征,表示地理事物和现象的空间分布。如在分层设色地图上,按照设计好的色层表,用不同颜色表示不同海拔高度的地形。现在习惯使用的色层表,用蓝色表示水域、海洋,在陆地上,由平层到高山分别用绿 First, to distinguish between regions and to indicate the spatial distribution. For example, in the maps of the world political regions, the territories of different countries are distinguished by different colors, and the boundaries of different provinces and regions in the national political maps are distinguished. Second, distinguishing between different quantitative features indicates the spatial distribution of geographical things and phenomena. As in the layered color map, according to the design of a good color table, with different colors that different altitudes of the terrain. Now used to use the color table, blue, said waters, oceans, on land, from flat to high mountains, respectively, with green