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.
点子图：绘画由各位置收集得来的收据，用以显示事件于不同地方出现的密度。
Dot maps: Mapping data collected at each location, attempting to show the spatial density of various places.
思维导图是能让你的大脑在一时间内产生很多点子的最好方法。
Mindmapping is the best way to brain storm lots of ideas at one go.
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