Cartographic Animation- a map that incorporates animation to show a change in some dimension, commonly a change over time.
This map reflects trends in population from 1910-2000. Each point of light equals 10,000 people, and from the map it is easy to see how the major urban centers grew and when. Other maps that are in conjunction with this one show the black population as a percentage of the total population, and the differences between where blacks settled versus where the total population settled. Maps like this one make it easy to convey a lot of data in one map, instead of having to make ten separate maps and then read them in order.
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