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How can I view National Wetlands Inventory (NWI)
maps?
- How do I find available NWI digital map data?
- How can I purchase paper maps and NWI data
in other formats?
- How can I find out what an NWI map code
means?
- Where can I find metadata for NWI quads?
- How do I cite NWI digital data or hard-copy maps
in publications?
- How far do I have to zoom in to be able to see
the wetlands polygons on the Wetlands Mapper?
- How large an area of wetlands data can I
download from the Wetlands Mapper? What do I do if I want data for a larger
area?
- How recent are the maps?
- When will the maps be updated?
- Whom do I contact when I have a question?
1. How can I view National Wetlands Inventory (NWI) maps?
Visit
our
wetlands mapper. The mapper hosts the most current digital
data and metadata available. For questions on the Mapper,
contact the Wetlands Team at
Wetlands_Team@fws.gov.
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2. How do I know what
NWI GIS data is available for an area?
Visit our
wetlands
mapper. The mapper hosts the most current digital data and
metadata available.
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3. How can I purchase paper maps?
Our paper maps can be
purchased through a
Cooperator-Run Distribution Center in most States. Each
Center establishes its own pricing structure and ordering
procedures. The Distribution Centers offer paper composites (NWI
wetland polygons on USGS topographic base) of the NWI maps.
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4. How can I find out
what an NWI map code means?
Visit the
NWI Map Codes Query Form and type in the case-sensitive
code. For example, if you're wondering what a PUBHh is, just
type it into the NWI Map Codes Query Form, it will give you an
explanation. (It's a Palustrine, Unconsolidated Bottom,
Permanently Flooded, Diked/Impounded wetland.) You can also
determine the codes by using the NWI
Map Code Legend diagram that lays out the classification
system by system, subsystem, class, subclass, plus modifiers (2
pages in PDF format). The NWI wetland codes, as modified, are
based on the National Wetlands Classification Standards from
Cowardin, L.M., V. Carter, F. Golet, and E. LaRoe. 1979.
Classification of Wetlands and Deepwater Habitats of the United
States. U.S. Fish and Wildlife Service (Cowardin).
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5. Where can I find
metadata for NWI digital data?
Visit our
wetlands
mapper. The mapper hosts the most current digital data and
metadata available.
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6. How do I cite NWI digital data or hard-copy maps in
publications?
For NWI digital data downloaded from our website:
U. S. Fish and Wildlife Service. publication date. National
Wetlands Inventory website. U.S. Department of the Interior,
Fish and Wildlife Service, Washington, D.C.
http://www.fws.gov/nwi/. For NWI hard-copy maps: U. S. Fish and
Wildlife Service. publication date. National Wetlands Inventory
map: Map name, State (scale 1:XX,XXX). U.S. Department of the
Interior, Washington, D.C.
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7. How far do I have to zoom in to be able to see the
wetlands polygons?
Wetlands display at a scale of 1:100,000 for
the lower 48 states.
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8. How large an area of wetlands data can I download from the
Wetlands Mapper?
What do I do if I want data for a larger area?
You can download data from the Mapper for an area once the
wetland polygons are visible. For data for larger areas, please
contact the Regional Wetlands Coordinator for your area by
visiting:
http://www.fws.gov/nwi/Regionofc/Rwc.htm or contact the
Wetlands Team.
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9. How recent are the
maps?
Most NWI maps were produced using photography from the
1980's. Maps for less than 5% of the nation were made using
1990's or more recent photography. View the
metadata to see the year of the photography for specific
map, areas or quads.
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10. When will the maps be updated?
We are currently updating
about 1% of the maps of the U.S. on average each year, with the
highest priority areas being updated. Agencies and organizations
interested in becoming partners should contact the appropriate
Regional Wetlands Coordinator.
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11. Whom do I contact when I have a question?
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