[Talk-us] US Hydrographic Data
perrygeo at gmail.com
Thu May 1 18:28:37 BST 2008
On Thu, May 1, 2008 at 10:17 AM, 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.
Very cool! We would definitely have to be more careful about which
features we used, how they were tagged, making sure they didn't
conflict with existing features, etc.
Matthew T. Perry
More information about the Talk-us