posts tagged 'cartogram'

introducing OpenLayers Symbology

a JavaScript library for thematic mapping in OpenLayers

At last October’s NACIS Practical Cartography Day I gave a very sweaty presentation that was later described as bewildering and incoherent.  I had always meant to partially redeem myself by packaging and cleaning up the code that formed the basis of that talk.  And here it is!
OL-Symbology is [...]

the first thematic maps

Below’s a quick outline of the first maps created with six common cartographic symbologies. All of the below is out there, in books, articles, and blog posts. Particularly helpful are Alan MacEachren’s 1979 article The Evolution of Thematic Cartography, Arthur Robinson’s Early Thematic Mapping in the History of Cartography (1982), Borden Dent’s thematic cartography [...]

political cartography: voting with our pocketbooks

These election maps are kinda late. Here I’m interested in comparing how we, as a country, voted with our ballots versus how we voted with our dollars. Obama received about 70% of the money donated to the major candidates in 2008, but only 53% of the votes, so I expected a bluer map. [...]