Portland: The Age of a City

Start with simple data: 619,000 building footprints, 544,033 of them including the year that they were built. Justin Palmer of GitHub created this beautiful map of Portland’s buildings with TileMill. The color scheme that he chose, as well as the varying patterns of neighborhoods — some in neat post-war rows, some in more organic arrangements — makes for a really pleasing visual. Read more about Justin’s work in his post, Portland, Oregon: The Age of a City.