This polygon data layer represents the National Wetlands Inventory for Portland Metro, Oregon in 1992. The dataset was originally published by the Metro Data Resource Center in February 2001.[NWI digital data files are records of wetlands location and classification as defined by the U.S. Fish & Wildlife Service. This dataset contains ground planimetric coordinates of wetlands, line, and area features and wetlands attributes.][1992 Obtained from U.S. Fish and Wildlife. Data created 1983 - 1990.]