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  1. Lower Columbia Digital Terrain Model, 2010

    The 2010 Lower Columbia Terrain Model is a combined bathymetric/topographic seamless digital surface model created by the Portland District of the US Army Corps of Engineers.  The project was completed primarily to support hydraulic modeling related to the Columbia River Treaty, however its applications extend far beyond this.

    Published Year: 
    United States Army Corps of Engineers
  2. Columbia River Estuarine Ecosystem Classification GIS Layers

    The Columbia River Estuaryine Ecosystem Classification is comprised of a hierarchical group of 6 geospatial data sets which characterize the unique ecosystem of the lower Columbia River and estuary.  The framework was developed for applications in larger river systems characterized by very long reaches of tidal freshwater (nearly 200 km, in the case of the lower Columbia).

    Published Year: 
    University of Washington, USGS