“Mapping Wikipedia” lets users visualize every geotagged Wikipedia page that’s been edited since 2001. The customizable mapping tool, created by the Oxford Internet Institute and visualization company TraceMedia, can display Arabic, Egyptian Arabic, English, Farsi, French, Hebrew, and Swahili Wikipedia pages colored according to word count, number of authors, number of anonymous edits, and other characteristics. Trends emerge, such as pages’ tendencies to cluster around interstate highways in the United States and the fact that West Africa has far more pages in English than Central Africa. Users can also discern individual Wikipedians’ personal projects. For example, a cluster of edits on the Arabic Wikipedia reveals that a lone editor created pages for every London Underground station.