Some of the US boundary data gives "USGS DRG" as a source. This seems to stand for "Digital Raster Graphic" files. It is my suspicion that this raster was vectorized as part of an import process, but I have no documentation to support that. Still, I consider it a convenient explanation for why the data doesn't seem to match anything currently available from TIGER.
Here at the PA/WV state line there is an anomaly of about 100m: https://osm.org/go/ZWmfhbe The current OSM data have the PA/WV boundary as a straight line, but TIGER says it's not. That's the only reasonable explanation for the Weirton city border to jut into PA by this much — the city border is true to currently available TIGER data, and state border needs to be updated. On Mon, Jul 9, 2018 at 2:36 PM Martijn van Exel <[email protected]> wrote: > > Frederik, > > These boundaries are often very outdated. I don't know which TIGER vintage > they were imported from. I have been replacing them piecemeal from current > TIGER as I work, but we should probably replace them altogether and have a > plan to keep them updated. I don't think they interfere with other features > much, but obviously that should be researched. > > As for this specific case, current boundary from TIGER 2017 in brown, OSM in > green: https://cloud.rtijn.org/s/bpxPffp6ycm8rF7 > > -- > Martijn van Exel > [email protected] > > On Mon, Jul 9, 2018, at 05:10, Frederik Ramm wrote: > > Hi, > > > > I've recently traced a little bit of stuff in Annetta, TX. The area I > > looked at had a lot of potential for someone interested in mapping from > > aerial imagery (houses, tracks, driveways, parking missing; some > > driveways tagged as highway=residential etc.) and I did what I could in > > the small area I worked on, but there was one thing I didn't dare touch > > and that's admin boundaries. The ones I encountered often cut straight > > through residential buildings and I thought that can't be right, but I > > know too little about boundaries in the US to fix any of it. I am > > specifically talking of > > > > https://www.openstreetmap.org/relation/114418 > > > > and > > > > https://www.openstreetmap.org/way/33245202 > > > > - maybe someone local wants to give them a closer look. Maybe it's ok > > the way it is. The Annetta North boundary is relatively straight but has > > one wobbly bit, is there maybe a waterway missing in OSM? _______________________________________________ Talk-us mailing list [email protected] https://lists.openstreetmap.org/listinfo/talk-us
