Metro Data Resource CenterThis polygon data layer represents the National Wetlands Inventory for Portland Metro, Oregon in 1998. The dataset was originally published by the Metro Data Resource Center in February 2001.[This layer is the National Wetland Inventory (NWI) with revisions made by local governments in the tri-county region. These revisions were coordinated by Metro's Growth Management department.]Shapefileark:/77981/gmgsg73735sengPublicNational Wetlands Inventory Polygon Portland Metro, Oregon 1998DatasetsPortland MetroOregon1998American Geographical Society Library – UWM Libraries