[Talk-us] National Wetlands Inventory

Steven Johnson sejohnson8 at gmail.com
Thu Aug 12 17:35:30 BST 2010

I'm not an expert on either of these data sets, but I know enough to say
that USGS sponsored the development of the NHD, largely to replace the old
digital line graph (DLG) products. NHD serves as a multi-purpose inventory
of surface waters, grouped by watershed. OTOH, FWS sponsored development of
Natl Wetlands Inventory, largely as a basis for habitat suitability. The
data may overlap, but they serve two different purposes/missions.

"Wretches, utter wretches, keep your hands from beans." -Empedocles

On Thu, Aug 12, 2010 at 12:12, Ian Dees <ian.dees at gmail.com> wrote:

> I wonder if our friends at the USGS know about this data. If they do, there
> must be a good reason why they aren't using it for NHD, since I was under
> the impression that NHD was the authoritative dataset for waterways in the
> US.
> On Thu, Aug 12, 2010 at 10:46 AM, Nathan Edgars II <neroute2 at gmail.com>wrote:
>> I'm wondering if anyone has any experience with the National Wetlands
>> Inventory: http://www.fws.gov/wetlands/
>> At first glance it looks like better-quality data than the NHD for
>> both wetlands and water.
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