Portland State University Library
Map Collection

Telephone: 503.725.4126 / 503.725.4128
Fax: 503.725.4524

_____________________________________________________________________________________

Home  |  Hours  |  About the Collection  | Circulation Policy  |  Reference Assistance
_____________________________________________________________________________________

WETLANDS MAPS

Wetland maps are produced as part of the National Wetland Inventory (NWI) of the U.S. Fish and Wildlife Service. Wetlands are identified from aerial photographs, based on vegetation, visible hydrology and geography in accordance with the Classification of Wetlands and Deep Water Habitats of the United States (FWS/OBI-74/31 Dec. 1979). This information is superimposed on U.S.Geological Survey topographic quadrangles, of which there are about 1,884 for the state of Oregon.

Holdings in our collection are indicated on:

Oregon Wetland Inventory [Index to 7.5 min. maps]

See index in Map Case 18, Drawer 4.

In general, our holdings consist of wetland maps for the Metro area (Multnomah, Washington, Clackamas counties) and the Columbia river from Astoria to the Dalles.

Return to library home