[Talk-us] US Hydrographic Data

Ian Dees ian.dees at gmail.com
Thu May 1 18:18:48 BST 2008


Which data set should I ask for? I'm assuming Shapefiles, but I want to make
sure.

On Thu, May 1, 2008 at 12:17 PM, Karl Newman <siliconfiend at gmail.com> wrote:

> On Thu, May 1, 2008 at 10:10 AM, Ian Dees <ian.dees at gmail.com> wrote:
>
> > I e-mailed the folks at the NHD about obtaining all the data for the US
> > in one chunk. They responded:
> >
> > --------------
> >
> > We offer full national coverage of the NHD database on DVD. This
> > includes
> > all medium resolution, and available high resolution NHD.  This
> > is a April 2008 snapshot of the database. We have two versions of
> > national
> > exports, SDE 9.1, or shapefiles.
> >
> > ArcSDE 9.1 Exports:  8.6 GB on 2 DVDs, requiring 20 GB of space when
> > unzipped
> > Shapefiles:  17 GB on 5 DVDs, requiring 42 GB of space when unzipped and
> > untarred
> >
> > ----------------
> >
> > I will ask them to send the DVDs and post the data online if we are
> > interested in uploading it as a dataset.
> >
>
> That would be awesome. Maybe we could rip out the TIGER hydrographic
> features and replace them with the NHD stuff. Maybe coastlines, too? I guess
> we'd have to be careful about duplicating/overwriting people's work, though.
>
> Karl
>
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