Martijn, When I looked at the problem of un-reviewed roads in Washington State, I considered two approaches. First, use a Tasking Manager to break the state into smaller chunks. Looking at the map of the US, Washington State doesn't seem all that large. But when you get into breaking the state into 1 mile squares, you'd need over 70,000 tiles to check. The second approach, one one I ended up using is to use Maproulette to check just TIGER roads imported that haven't been touched since. There was still 30,000 ways in the second group. Note - I didn't look at tiger:reviewed=no since most people, including me, often forget to either change it to yes or just delete the tag. I think we should just delete the tag like JOSM currently does.
The clean up effort is still ongoing. I have personally cleaned up a handful of counties which seems quicker but that approach doesn't have any backup measures. Backup measures like, keeping roads in the database until someone checks that they have fixed it or it wasn't a problem. I like the systematic approach that Maproulette offers. MR3 has a feature that I really like. One of regularly editors in Eastern Washington wanted to look at just roads around him. MR3 as I understand, can do that. Now if some company with large amounts of gpx traces were to give us a point cloud of gpx points, we could quickly start cleaning up these rural roads. Hint - Hint - Telenav. As a interesting bit of information, only one way is left untouched in King County from the original import - and it looks good. Martijn - I'm not sure I really answered your query. Let me know if you need more. Best, Clifford -- @osm_seattle osm_seattle.snowandsnow.us OpenStreetMap: Maps with a human touch
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