We’ve chosen a series of cities that we think are representative of the wide range of coverage that’s available in Open Street Map, and also for their expressive potential. New York reveals a cluster of interest in downtown Manhattan and Roosevelt Island, without much else of distinction except the freeways. Paris sprawls densely along the Seine with enormous parks to the east and west of the city center. Toronto hugs Lake Ontario with parks like veins threading back away from the shoreline. Cities have character, and this is reflected in more than just their streetscapes or their skylines—it’s reflected in how they’re mapped by volunteers.