[OSM-talk] US County and State Borders Was: Re: TIGER, which states next?
Adam Schreiber
sadam at clemson.edu
Wed Dec 5 16:41:52 GMT 2007
On Oct 24, 2007 12:14 PM, Ted Mielczarek <ted at mielczarek.org> wrote:
>
> On 10/24/07, Dave Hansen <dave at sr71.net> wrote:
> > On Wed, 2007-10-24 at 10:31 -0400, Ted Mielczarek wrote:
> > >
> > > Yep, they're all TIGER data, provided as shapefiles by the Census
> > > bureau. I've already imported the state boundaries for the northeast
> > > of the US, you can see them in mapnik as dashed red lines. I didn't
> > > just throw them all in willy-nilly, I split the borders into sections
> > > so I could label them left:state and right:state, and I deleted
> > > overlapping border sections.
> >
> > Manually, or programatically?
> >
> > We'll probably have to automate it to get county boundaries. There are
> > just too many of them to do manually.
>
> Manually. It's not so bad for states since they have nice large
> borders and large overlapping areas. It would be tedious for
> counties. There's probably an algorithm you could use to find the
> common borders, but I haven't looked at all.
Could you provide a thumbnail sketch of the procedure you're using to
extract the state boundaries? I have some free time of from school
and would be interested in doing some of the Southeastern states.
Thanks,
Adam
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