LivingWithDragons, I'm not sure about the legal aspects of provenance when it comes to asking someone over a phone. For all you know they could be looking it up on Google Maps - then it's technically derived data - and if it happens to be a classic google "easter egg" road (there are LOADS of them!) and it gets published in OSM, what happens next? One thing I can't seem to see in OSM is a tag for describing provenance of data (in other words, where it came from - asked someone is different to reading it on a sign is different to... etc. Anybody though about this? It's making my head hurt!

Dave Pearson