[Talk-us] US Hydrographic Data

Ian Dees ian.dees at gmail.com
Wed May 7 16:51:34 BST 2008

I was going to modify Matthew's script here:


to try and fix the issues that he described in the header:

- support "holes" in water bodies (islands)
- tag OSM data with all available NHD data
- split long ways in the resulting OSM data

Dave, maybe you could point us to the script you used to import the TIGER
data? That way we can try and do a similar thing for the NHD data?

On Wed, May 7, 2008 at 10:46 AM, Dave Hansen <dave at sr71.net> wrote:

> On Wed, 2008-05-07 at 10:32 -0500, Ian Dees wrote:
> > I am the proud recipient of 42GB worth of hydrology data.
> >
> > It appears that the data is in several .tar.gz files. I am working on
> > unpackaging the data right now. I imagine the next step would be to
> > extract the subbasins from the overall dataset, make sure the NHD ->
> > OSM script works as we want it, then start the conversion process.
> >
> > Would anyone be willing to help on the script?
> Sure.  What do you have so far?
> -- Dave
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