OpenStreetMap
Routing is a very good way to highlight errors in OSM data. I have begun a process to identify and correct roundabouts in my area of Oxfordshire, England whose directional arrows point anti-clockwise instead of clockwise, because I have found so many to be incorrect.
Diskusija
Naudotojo Pierre Mauduit komentaras, parašytas 2009 m. sausio 20 d., 21:55
When I began mapping, I found a roundabout in the wrong way near my hometown in France. Then I wondered "mmmh, there must has been either a drunken driver or an english mapper by there ..." ;-)