[Talk-us] National Wetlands Inventory

Ian Dees ian.dees at gmail.com
Thu Aug 12 17:40:45 BST 2010

Hmm. It sounds like we want the "routability" of the NHD reach-code system
with the accuracy and completeness of the Wetland Inventory.

I wonder if there's some "gotcha" in the FWS dataset that would make it
inappropriate to use. For example, I see a lot of freshwater areas that are
really inundation/flood control areas in my area. It would be difficult for
an import to tell the difference between those two things.

On Thu, Aug 12, 2010 at 11:35 AM, Steven Johnson <sejohnson8 at gmail.com>wrote:

> 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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