Hi Problems 1, 2, 3, 4, 6, and 9 should have been fixed before the first file was uploaded. OSM files that are going to be imported, should 100% clean in the JOSM validator. This is a pretty basic thing, right?
7 - Building that already exist in OSM should be skipped, especially since it looks like the addresses are going to just stay as isolated nodes. ST_Intersects is your friend. 9 - Building that overlap with the roads should be pulled from the rest of the data and conflated separately. In MA, when a building overlaps a road, most of the time, the road is in the wrong spot, not the building. It needs a human to sort it out. Use ST_Intersects to find them ahead of time, and fix the bad roads and import the corrected buildings by hand. 8 - Any workflow that requires cutting pasting between layers of multipologons is broken. It is very very tricky to not screw it up, with 20 people helping, it is hopeless. Please, change your workflow to not need a copy/paste. Jason On Mon, Oct 14, 2013 at 5:54 PM, Alex Barth <[email protected]> wrote: > Ok, here's what I think we should do: > > 1. Join T intersections in conversion (Matt and I are on this) > https://github.com/osmlab/nycbuildings/issues/8 > 2. Set up a QA script reporting common mistakes (start here > https://github.com/osmlab/nycbuildings/issues/18) > 3. Write up nice blog post highlighting some of the mistakes, send out to > existing importers > 4. Reach out personally to repeat "offenders" > 5. Not grow number of individuals involved until we increase quality. > > > > On Mon, Oct 14, 2013 at 4:59 PM, Pieren <[email protected]> wrote: >> >> On Mon, Oct 14, 2013 at 9:51 PM, Serge Wroclawski <[email protected]> >> wrote: >> >> > Yet, despite all this instruction, we had a lot of errors in the data, >> > even from extremely experienced mappers. >> > We could really use your help in coming up with solutions to these >> > problems! >> >> We have the same issues in the French building imports since ... 2010 >> (it's a long-running country-wide import). What you can do is >> - you only allow the import to certified contributors ... or: >> - provide the best original data. If you can, fix the geometric errors >> automatically (duplicate nodes, missing intersecting nodes and >> overlaps). Conflation is a bit more complicate (too many cases) and >> should remain manual. >> - contact people and explain them again where they do mistakes and how >> to proceed (or point again to your tutorials) >> - create a QA tool reporting the errors you mention then let the >> community fix them. In France, we developed a QA tool called osmose >> reporting duplicate nodes, highways crossing buildings (item 1070), >> buildings overlapping (item 0) etc ([1]). If errors are increasing, >> create taskforces around a specific error or area. >> >> Pieren >> >> [1] http://wiki.openstreetmap.org/wiki/Osmose >> [2] http://wiki.openstreetmap.org/wiki/Osmose/errors >> [3 http://osmose.openstreetmap.fr/en/map/ >> >> _______________________________________________ >> Imports mailing list >> [email protected] >> https://lists.openstreetmap.org/listinfo/imports > > > > _______________________________________________ > Imports mailing list > [email protected] > https://lists.openstreetmap.org/listinfo/imports > _______________________________________________ Imports mailing list [email protected] https://lists.openstreetmap.org/listinfo/imports
