[Talk-us] Counties Data Import

Ian Dees ian.dees at gmail.com
Tue May 13 00:27:45 BST 2008

I uploaded the data with the lines overlapping. I figured by combining the
ways into one with left and right tags, we are making it quite a bit harder
to query the database to determine which county any particular point is in.
Also, there would be a significant amount of work to write the import app to
do that, and I didn't think it was worth it to add time on both ends of the

On Mon, May 12, 2008 at 6:14 PM, Ted Mielczarek <ted.mielczarek at gmail.com>

> On Fri, May 9, 2008 at 10:41 AM, Ian Dees <ian.dees at gmail.com> wrote:
> > Hi everyone,
> >
> > While I was trying to figure out how to divide the massive NHD dataset
> into
> > more management pieces, I found a county boundary dataset and converted
> it
> > to OSM.
> >
> > I uploaded Wisconsin and Minnesota county boundaries and submit them for
> > your review. One minor issue:
> >
> > http://tah.openstreetmap.org/Browse/?x=1036&y=1489&z=12&layer=tile
> > ... shows that each county is a separate, closed way in OSM. This means
> that
> > at most boundaries, the dashed lines that are used to render political
> > boundaries are overlapping and look odd. I can't see a way around this
> > without losing metadata.
> >
> > If you have any opinion on how this data is represented, please let me
> know.
> > Otherwise, I will upload the rest of the country later on this weekend.
> I looked at this data when I uploaded the state borders a while ago.
> The state borders I (and Adam) split by hand into non-overlapping
> sections, tagging them with left:state and right:state appropriately.
> I figured it would be too much work to do the county borders manually
> like that, but I didn't feel like trying to write a program to do it
> in an automated fashion either. I'm not really excited for having lots
> of overlapping borders like that, but I guess I can manually clean up
> the ones in my area if I care enough.
> -Ted
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