CDPs are used by Census and other Federal agencies, OMB in particular. They are used as a tool to administer programs, for example Federal block grants. I'm not sure they have much use beyond that. State/tribal/county/municipal boundaries OTOH are much more useful and likely to reflect a consensus between those branches of government.
-- SEJ -- twitter: @geomantic -- skype: sejohnson8 There are two types of people in the world. Those that can extrapolate from incomplete data. On Wed, Nov 6, 2013 at 9:22 PM, Richard Welty <rwe...@averillpark.net>wrote: > On 11/6/13 4:52 PM, Greg Troxel wrote: > > > > > > Are you aware of any regulatory impact of crossing a CDP boundary > > (ignoring impacts of crossing other boundaries that coincide)? I am > > not, and I have no idea where the CDP boundaries are around me. > CDP boundaries are worse, really, than that. i discovered in working > through boundaries downstate (Rockland and Westchester Counties) > that the Census Bureau had substantially changed a bunch of CDP > boundaries between 2008 and 2013, downsizing a bunch of them > quite a lot. > > i thought they were for comparing counts census to census, but now > i really don't know what they're for if the boundaries can change > that much. > > > > All in all, I think CDP boundaries should be either > > > > removed from OSM, or > > > > changed to have some boundary=census tag, if they are useful > > > the latter, i think. there are parts of the US where the CDP > boundaries do contribute to the map. > > richard > > > > _______________________________________________ > Talk-us mailing list > Talk-us@openstreetmap.org > https://lists.openstreetmap.org/listinfo/talk-us > >
_______________________________________________ Talk-us mailing list Talk-us@openstreetmap.org https://lists.openstreetmap.org/listinfo/talk-us
