Flickr as a Paintbrush [cartogrammar.com] reveals the recorded
colors of our surrounding landscape, both in a physical and
cultural sense. In short, Andy Woodruff created a set of
geographic heatmaps that represent the average colors of images
taken on locations surrounding a specific landmark. In other
words, the resulting maps reveal the colors that people on the
ground should be looking at. Technically, these maps are based
on the most recent 2,000 photos uploaded to Flickr that were
geotagged within a specified bounding box. These were then
averaged by hue. As an emergent result, the color red reveals
the dominance of brick, while green/yellow colors naturally
denote grass and trees. However, some unexpected patterns appear
as well, such as blue/purple in the map of Boston.