hans.gerwitz.com

Gerrymandering

It's inevitable that we carve up geography to group people. Political borders are usually the result of negotiations between land-hungry powers, or politicians seeking to tweak group distribution.

Julian Oliver's Border Bumping project has me thinking again about alternate motivations, so I've assembled some of my favorite alternative approaches to US cultural cartography:

slavery William C. Reynold's slavery map was one of the first artifacts that piqued my schoolboy interest in cartography. It may be quite simplistic, but was (and remains) very effective in communicating the state of the nation in 1856.

allegiance Michael Baldwin's Common Census is my modern favorite, built by voluntary association with named places. It should be no surprise that cities are highly influential.1

dialect Another favorite view is Robert Delaney's dialect regions, or Rick Aschmann's similar work.

connections Also using communication, MIT, AT&T, IBM, and probably some other TLAs have mapped socially connected regions based on mobile phone calls. Then with Vincent Blondel (of phone identification fame) they went meta.

pop vs soda Alan McConchie has an ongoing project to track what Americans call soft drinks that shows some pretty clear boundaries.23

money movement Dirk Brockmann got a lot of attention mapping areas of mobility using paper currency tracking as a proxy4 and points out it corresponds well to BEA Economic Areas.

equal population Neil Freeman has drawn fifty states of equal population.

EPA ecoregions I wouldn't be a proud citizen of Cascadia if I didn't include ecoregions.

Constellations With a midnight mapping of star constellations to Earth's surface, Jim Davenport also finds a Cascadia in Corona Borealis.

Starbucks Davenport also cleverly uses Voronoi diagrams to define states based on distance from Starbucks.

Capital Voronois Jonathan Dowse also uses Voronoi cells, but choses existing state capital cities for the vertices.

City Voronois Jason Sundram uses Voronoi around each existing state's largest city. He also has capital and centroid models.

Up in Arms Colin Woodard looks to history to inform 11 nations of distinct cultures.

  1. or that I consider this a more valid method of grouping than states.

  2. Edwin Chen has mined Twitter for similar data.

  3. See also the sweet tea divide.

  4. Livehoods has similar goals using checkin data from Foursquare and operating at the city level.