Places and Spaces

Places and Spaces is an exhibit that’s been making the rounds, both online and in real life (it’s at Wikimania this weekend, for example). It compares and contrasts geographical maps with maps of less physical, more abstract things — cartograms, flowcharts, and other things I’m having trouble grasping. Maps can portray more than just geographic information, but I’m a little unclear about where a map ends and where a chart or graph begins.