Special maps called choropleth maps use map color to represent statistical data.
叫做等值线图的特殊地图使用地图的颜色来表示统计数据。
Three common quantitative thematic maps are choropleth maps, dot maps and proportional symbol maps.
面量图、点子图及比例符号图中三种最常见的定量专题地图。
Three common quantitative thematic maps are choropleth maps, dot maps and proportional symbol maps.
面量图、点子图及比例符号图中三种最常见的定量专题地图。
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