{ "culture": "en-US", "name": "", "guid": "", "catalogPath": "", "snippet": "Pilot project hydrologic unit boundaries defined by USGS Watershed Boundary Dataset (WBD) specifications and developed by NV5.", "description": "

Data were collected by NV5 to meet standards laid out in the US Geological Survey\u2019s (USGS) Elevation-Derived Hydrography (EDH) Acquisition Specifications (Elevation-Derived Hydrography Acquisition Specifications: Collection Area Requirements) and the EDH Representation, Extraction, Attribution, and Delineation (READ) Rules (Elevation-Derived Hydrography\u2014Representation, Extraction, Attribution, and Delineation Rules). The Stillaguamish EDH data was derived using a combination of six different previously collected lidar projects provided through Washington State's Department of Natural Resources Lidar Portal (Darrington 2003, North Puget USGS 2006, Tulalip 2013, Glacier Peak 2015, North Puget 2017, and Skagit Delta 2019). When available, breaklines delineating stream/river and lake/pond for the hydroflattening of these datasets were also used. The datasets were acquired and merged in 2023. <\/SPAN><\/P>

A hydrologic unit is defined by USGS as a drainage area delineated to nest in a multilevel, hierarchical drainage system. Its boundaries are defined by hydrographic and topographic criteria that delineate an area of land upstream from a specific point on a river, stream, or similar surface-water feature (https://pubs.usgs.gov/tm/11/a3/pdf/tm11-a3_5ed.pdf).<\/SPAN><\/P><\/DIV><\/DIV><\/DIV>", "summary": "Pilot project hydrologic unit boundaries defined by USGS Watershed Boundary Dataset (WBD) specifications and developed by NV5.", "title": "HU12", "tags": [ "elevation", "inlandWaters", "Washington State Department of Ecology", "ECY", "EDH", "NHD", "hydrography", "Stillaguamish", "Washington State", "watershed", "DEM", "WBD", "water", "streams", "ITSO", "3DHP", "hydrologic unit", "HU" ], "type": "", "typeKeywords": [], "thumbnail": "", "url": "", "minScale": 150000000, "maxScale": 5000, "spatialReference": "", "accessInformation": "NV5 Global, Inc. (NV5 Geospatial)\nUnited States Geological Survey\nWashington State Department of Natural Resources\nWashington State Department of Ecology", "licenseInfo": "

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The Washington State Department of Ecology (Ecology) uses Geographic Information System (GIS) data as an aid in accomplishing its mission of protecting the land, air, and waters of the state. The agency has built this spatial dataset to better describe the diverse natural and cultural environment we live and work in.<\/SPAN><\/P>

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