Cached at <a href="http://webcache.googleusercontent.com/search?q=cache:6c9OrzUPXE0J:en.wikipedia.org/wiki/TopoJSON" rel="nofollow">http://webcache.googleusercontent.com/search?q=cache:6c9OrzU...</a><p>It was deleted for lack of importance. The only secondary source is a 2013 talk[1], which doesn't establish importance.<p>The link now goes to GeoJSON#TopoJSON, which is much better.<p>[1] <a href="http://vimeopro.com/openstreetmapus/state-of-the-map-us-2013/video/68099164" rel="nofollow">http://vimeopro.com/openstreetmapus/state-of-the-map-us-2013...</a>