[OSM-talk] US County and State Borders Was: Re: TIGER, which states next?

[Ted Mielczarek]

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.

-Ted