[Talk-us] Admin borders in the US: CDPs

[Steven Johnson]

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 <rwelty at 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
>
>
>
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