Thanks for bringing this up, Frederik. I reached out to the user in a changeset and a mail thread (links below) and was under the impression that they would fix the problem. Was that really two years ago?
https://www.openstreetmap.org/changeset/41375854 - changeset https://gist.github.com/talllguy/7d813ece238f359317786a18f7b7bbcb - message thread copy I'd say go ahead and remove the extraneous nodes and also any buildings that are either version 0 or do not have any new tags (like names or addresses). The Microsoft buildings could replace any buildings that are only footprints. If you can cull this down to those with some information besides the geometry alone, the community can fill in the blanks. On Thu, Aug 16, 2018 at 8:10 AM Frederik Ramm <frede...@remote.org> wrote: > Hi, > > over the last 2 years, DWG has had a three different complaints about a > buggy building import that has been run on and off by the user > "annapolissailor". > > The import was problematic in many ways, most obviously because huge > batches of un-used nodes were uploaded and later it was attempted to > connect them, which sometimes failed, leaving lots of un-used nodes in > the database; also, almost all buildings are over-noded, taking 10 or > more nodes for a simple rectangular building (eg > https://www.openstreetmap.org/way/435663194). Buildings that were in the > area before have been deleted outright, and the data source and legal > situation is unclear (many buildings are much too precise to have come > from aerial imagery). > > (Needless to say, had the import been discussed up front as is > customary, all these issues could have been avoided.) > > I have tried to work with the importer but they seem to be ultimately > unable or unwilling to fix the problems even though they did seem to > understand the issue at some point > (https://www.openstreetmap.org/user_blocks/1587). They asked me a couple > of times to "hold off reverting data until next steps are discussed on > the imports list" but never followed up on the promise. They claimed to > have spent hundreds of hours on the JOSM validator improving problems > they had introduced. > > I am at the moment deleting about 70,000 untagged and un-used nodes that > have been left over from this import, which is the uncontroversial part. > > The total amount of buildings created and still visible is 177,151, with > a total of 1,980,336 nodes, in the general area "East of Washington DC, > South of Baltimore, North of Chesapeake Beach". > > I think these buildings need to be deleted too, given their technical > (over-noding) and legal (we don't know where the data came from and what > license it is under) issues. > > However, given how much work the mapper claims to have invested in this, > I wonder if there's maybe a way to salvage the data. That would first > require us to clear up the legal situation, and if it turns out the > source is legal, then we'd have to go about killing the extra nodes in > buildings. > > I'm basically looking for volunteers here. Other mappers have tried to > discuss the issue with the mapper himself and never got far either, but > of course if someone wanted to try and enlist annapolissailor's support, > fair enough (perhaps agree here on the list who's doing it though, so > that we don't have 10 people spamming him...) > > I have prepared a file that contains all the buildings in question: > > http://www.remote.org/frederik/tmp/annapolis.osm.gz > > Bye > Frederik > > -- > Frederik Ramm ## eMail frede...@remote.org ## N49°00'09" E008°23'33" > > _______________________________________________ > Talk-us mailing list > Talk-us@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-us > -- Elliott Plack http://elliottplack.me
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