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The WA National Hydrography Dataset (NHD) Waterbody layer along with WA NHD Area layer represent the polygon water features such as lakes, reservoirs, and estuary. The Washington State National Hydrography Dataset (NHD) is the State standard (OCIO policy 161.03) hydrography layer. FeatureType (FType) categories are commonly used for symbolization (Estuary =493, LakePond = 390, SwampMarsh = 466, Constructed Reservoir =436, Ice Mass =378, and Playa =361). Waterbody features were originally considered “hydrographic” vs the “cartographic” Area features. Waterbody features can have a ReachCode, where Area features do not.
Copyright and disclaimer for Washington State Department of Ecology materials: https://ecology.wa.gov/About-us/Accountability-transparency/Our-website/Copyright-information
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