Hmm. I guess https://wiki.openstreetmap.org/wiki/United_States_admin_level <https://wiki.openstreetmap.org/wiki/United_States_admin_level> is really not correct then where it says: "Census Designated Places (CDPs) are boundaries maintained by the Census Bureau for statistical purposes. CDPs should be tagged boundary=census, ideally without an admin_level=* tag.”
Almost all Utah admin8 are in fact TIGER CDP boundaries: http://overpass-turbo.eu/s/DFS <http://overpass-turbo.eu/s/DFS> Also, https://wiki.openstreetmap.org/wiki/Tag:boundary=administrative#10_admin_level_values_for_specific_countries <https://wiki.openstreetmap.org/wiki/Tag:boundary=administrative#10_admin_level_values_for_specific_countries> is incorrect where it states that admin8 are "state municipalities: cities, towns, villages and hamlets (infrequent)” Furthermore, https://wiki.openstreetmap.org/wiki/WikiProject_United_States/Boundaries <https://wiki.openstreetmap.org/wiki/WikiProject_United_States/Boundaries> is also incorrect and suggests "Census-designated places (CDPs) are statistical, not administrative areas. Project TIGER fixup deletes outdated CDPs and retags relevant ones from boundary=administrative admin_level=8(or 7) to boundary=census, no admin_level=*.” Finally, there seem to be too many wiki pages covering this :) But that’s not unique for this topic. I guess we have some work to do! Martijn > On Nov 14, 2018, at 8:54 AM, Ian Dees <ian.d...@gmail.com> wrote: > > A friendly reminder that Census's TIGER data we have previously imported as > admin8 polygons aren't actually official city boundaries. They're "Census > Designated Places <https://en.wikipedia.org/wiki/Census-designated_place>" > which are just named "concentrations of people". In some cases the Census may > have gone to the trouble of incorporating city boundary information, but my > guess is that the majority of cases are just "Census blocks that look like > they're part of the city". > > Having said that, there really isn't a good national-level dataset of city > boundaries and Google uses CDP boundaries for their search results... > > On Wed, Nov 14, 2018 at 9:49 AM Martijn van Exel <m...@rtijn.org > <mailto:m...@rtijn.org>> wrote: > Sorry that link is bad. https://cloud.rtijn.org/s/ZLen9D8M3tYaAgj > <https://cloud.rtijn.org/s/ZLen9D8M3tYaAgj> > >> On Nov 14, 2018, at 8:44 AM, Martijn van Exel <m...@rtijn.org >> <mailto:m...@rtijn.org>> wrote: >> >> I looked at a few place boundaries in Utah and compared with current TIGER >> files.. Definitely needs work.. >> https://www.dropbox.com/s/e1113me8y9t1my5/Screenshot%202018-11-14%2008.42.30.png?dl=0 >> >> <https://www.dropbox.com/s/e1113me8y9t1my5/Screenshot%202018-11-14%2008.42.30.png?dl=0> >> (colored = current OSM, grey = TIGER places shape file 2018) >> >> Martijn > _______________________________________________ > Talk-us mailing list > Talk-us@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-us
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