Wetlands

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 www.PortlandMaps.com. -- Additional Information: Category: Hydro Purpose: For identifying the location of wetlands. Update Frequency: As Needed -- Metadata Link: https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=52608经三郡地区地方政府修订的国家湿地名录（National Wetland Inventory, NWI）。波特兰市规划与可持续发展局（City of Portland, Bureau of Planning & Sustainability）基于原Metro数据集对波特兰湿地数据进行了更新，以优化几何精度、移除错误标注的湿地范围，并补充缺失的湿地信息。该数据集可通过www.PortlandMaps.com在线浏览。—— 附加信息：类别：水文（Hydro）；用途：用于识别湿地位置；更新频率：按需更新—— 元数据链接：https://www.portlandmaps.com/metadata/index.cfm?&action=DisplayLayer&LayerID=52608