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Choropleths are thematic maps where geographic regions, such as states, are colored according to som...
Contains an administrative-level-1 map of the world. Administrative-level-1 is the generic term for ...
Contains 3 maps. 1) US States 2) US Counties 3) Countries of the
A system for 'declaratively' creating graphics, based on "The Grammar of Graphics". You provide the ...
Contains data and visualization functions for USA unemployment data. Data comes from the US Bureau o...
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Brian P Johnson