[Talk-GB] Messed up buildings in Preston
Hi All, I noticed some weirdness when doing some openstreetmap-carto work. http://www.openstreetmap.org/?lat=53.763681&lon=-2.723075&zoom=18&layers=M Notice a few things: * Overlapping buildings (e.g. to the south of the junction) * Strange triangular partial-buildings * Incredibly thin buildings (e.g. to the north of the junction) * Unlikely shapes of buildings (e.g. to the east) Move a bit further north: http://www.openstreetmap.org/?lat=53.767768&lon=-2.731803&zoom=18&layers=M Now I don't know the area, but I'll bet they don't build higgledy-piggledy like that in Preston. A brief look suggests this changeset: http://www.openstreetmap.org/browse/changeset/5994643 and the tags on the buildings suggest it's an import: source = Auto_OS_OpenData_StreetView So does anyone want to try fixing, redoing or reverting this, er, stuff? And does anyone know how widespread such "Auto_OS_OpenData_StreetView" damage is around the country? Taginfo suggests there's 45 598 cases - hopefully not all this bad? http://taginfo.openstreetmap.org/tags/source=Auto_OS_OpenData_StreetView Cheers, Andy ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Messed up buildings in Preston
On Wed, Mar 13, 2013 at 6:59 PM, Andy Allan wrote: > And does anyone know how widespread such "Auto_OS_OpenData_StreetView" > damage is around the country? Taginfo suggests there's 45 598 > cases - hopefully not all this bad? > > http://taginfo.openstreetmap.org/tags/source=Auto_OS_OpenData_StreetView Presumably this is output from http://wiki.openstreetmap.org/wiki/Mapseg(which has suitably big warnings about automated imports etc) Oliver ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Messed up buildings in Preston
I think some of that may well be me, I've been slowly but surly fixing it, but is compounded by the road network being a complete mess in many places, the difficulty in getting GPS lock to get something to align Bing too, and being 200km from my home town! The western half of Ashton and southern half of the city centre being sorted in the main. Annoyingly that is one junction I fixed until my editor crashed on upload :-( On Mar 13, 2013 7:01 PM, "Andy Allan" wrote: > Hi All, > > I noticed some weirdness when doing some openstreetmap-carto work. > > http://www.openstreetmap.org/?lat=53.763681&lon=-2.723075&zoom=18&layers=M > > Notice a few things: > > * Overlapping buildings (e.g. to the south of the junction) > * Strange triangular partial-buildings > * Incredibly thin buildings (e.g. to the north of the junction) > * Unlikely shapes of buildings (e.g. to the east) > > Move a bit further north: > > http://www.openstreetmap.org/?lat=53.767768&lon=-2.731803&zoom=18&layers=M > > Now I don't know the area, but I'll bet they don't build > higgledy-piggledy like that in Preston. > > A brief look suggests this changeset: > > http://www.openstreetmap.org/browse/changeset/5994643 > > and the tags on the buildings suggest it's an import: > > source = Auto_OS_OpenData_StreetView > > So does anyone want to try fixing, redoing or reverting this, er, stuff? > > And does anyone know how widespread such "Auto_OS_OpenData_StreetView" > damage is around the country? Taginfo suggests there's 45 598 > cases - hopefully not all this bad? > > http://taginfo.openstreetmap.org/tags/source=Auto_OS_OpenData_StreetView > > Cheers, > Andy > > ___ > Talk-GB mailing list > Talk-GB@openstreetmap.org > http://lists.openstreetmap.org/listinfo/talk-gb > ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Messed up buildings in Preston
On 13 Mar 2013 19:37, "Kev js1982" wrote: > > I think some of that may well be me, I've been slowly but surly fixing it, but is compounded by the road network being a complete mess in many places, the difficulty in getting GPS lock to get something to align Bing... > Loading building outlines in an area where the roads are a "mess" seems like a really bad idea. It just makes it even harder to sort things out. Loading the OS StreetView building outlines which are hugely simplified seems like an even worse idea. This tool doesn't seem to be production ready so probably the wiki page should say not to use it for production uploads. If Bing alignment is poor and you have no good traces you can always use an OS layer to align it. Kevin ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] Messed up buildings in Preston
I quickly learnt that that lesson and haven't done any more since. Been slowly fixing it ever since (and filling in various bits and pieces since) - kinda got distracted by software crashing on uploads so just banged it into JOSM (which I can never get the hang of) with the intention of fixing it (annoyingly the small areas I checked in detail before proceeding actually worked okay) soon after and quickly losing the will after losing multiple lots of edits. The building outlines actually pretty much match the area I grew up in (1930s - 1970s council new builds have lots and lots of rectangles!), it was only once the Mapnik rendering caught up a week or so later and panning towards the city centre that it became apparent how iffy the street-view data and road layout actually were. The road network was also reasonably good where I did my initial checks (thanks in part to the fixes I'd previously done from GPS traces). Mainly been working from the Lea area towards the docks and city though and been aligning to combination of OS data and the GPS traces, along with a combination of photos and local knowledge. *(The system really needs some form of "you've uploaded loads of stuff, is this really any good?" type warnings/cooling off period to try and get rid of some over-eagerness in getting extra detail in!)* Kev. On 14 March 2013 08:23, Kevin Peat wrote: > > On 13 Mar 2013 19:37, "Kev js1982" wrote: > > > > I think some of that may well be me, I've been slowly but surly fixing > it, but is compounded by the road network being a complete mess in many > places, the difficulty in getting GPS lock to get something to align Bing... > > > > Loading building outlines in an area where the roads are a "mess" seems > like a really bad idea. It just makes it even harder to sort things out. > Loading the OS StreetView building outlines which are hugely simplified > seems like an even worse idea. This tool doesn't seem to be production > ready so probably the wiki page should say not to use it for production > uploads. > > If Bing alignment is poor and you have no good traces you can always use > an OS layer to align it. > > Kevin > ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
