http://1nsane.info/map/start.kmz

- An experiment to show, from a given start point, all the roads you can cover within a specified distance. Green marks paths you can reach in the given distance. The blue circle has a radius equal to that distance.- The data used for routing comes from Openstreetmap and is © OpenStreetMap contributors . As with Google map data, sometimes the segments don't match up with reality, especially for sidewalks and parking lots. You can fix wrong or missing data yourself at osm.org . Note my map doesn't use live osm data, so it won't update here until I manually sync it.- It only works in Austin, roughly in the bbox (30.13,-98.03), (30.47,-97.48)- Check out Walkscore's Travel Time Map, or search for isochrone or isodistance map.- No!- 1) Read osm xml to build a network of highway nodes 2) traverse network (Dijkstra's algorithm) until distance is reached 3) output visited segments to a kml 4) load kml in google maps web api 5) ??? 6) PROFIT! Questions/comments: mapfun@1nsane.info