To Richard, I've seen examples where manually tracing over raster images has been done roughly and quickly. It's not a guarantee of quality. You are saying that it's time consuming to check data from external source and probably more accurate to trace manually over raster images. But it is also time consuming to draw manually building polygons, much more time consuming. And if you do the job carefully the final result in OSM is normally identical in both cases. I don't know where you leave Richard but if, let say, one of the next SOTM is happening in Berlin, you will probably have the choice between the plane, the car, the bike or your feet. Will you prefer to walk and arrive 10 years later or fly during 2 hours ? Instead of spending hours and hours in copying polygons, we have better time to cross-check the data with other sources, improve tagging and fix other mistakes. For the same amount of time, the final result in OSM will be much better if you take the vector data.
To Frederik, In your example, I agree with you that the diagonal line is a glitch, most probably coming from a parcel line just underneath. Our guideline asks to fix them before the upload but it's not always done. When I see one, I just fix it. This is the way how OSM works. Your second point is about indoor details. Myself, I'm also in favour of more simplicity e.g. one polygon per address. But who is able to decide the level of details on the map ? I started with blank areas five years ago and I also said "forget the buildings". Now we have people modeling houses in 3d, mapping indoor and tagging draught beers. Pieren _______________________________________________ talk mailing list talk@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk
