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  • Added 11 Sep 2018

National Wetland Inventory (NWI) with revisions made by local governments in the tri-county region. Portland wetlands are updated from the original Metro dataset by City of Portland, Bureau of Planning & Sustainability to refine geometry, remove erroneously mapped wetlands, and add missing wetlands. This data can be viewed online at

--Additional Information:
Category: Hydro
Purpose:For identifying the location of wetlands.
Update Frequency: As Needed

© City of Portland, Oregon

This layer is sourced from CGIS Open Data.


RegionsClark County, Multnomah County, Washington County

Technical Details

Layer ID 96786
Data type Vector multipolygon
Feature count 6459
Attributes NOTES, LLID, Reference_Source, Maintaining_Agency, HUC, Created_By, Flag_for_Review, Name, Watershed_ID, Creation_Date, Modifier_Name, Shape_Length, Modified_By, Modification_Date, HUC_Name, Reference_Source_Details, NHD_Feature_Code, Wetland_Code, Field_Date
Services Vector Query API


Added11 Sep 2018
Revisions 1 - Browse all revisions
Current revision Imported on Sept. 11, 2018 from Esri JSON in WGS 84 / Pseudo-Mercator. 17 geometries modified to be OGC compliant. Changelog.
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