Red alder trees distribution in the United States Pacific Northwest for 2002 summarized for NHDPlus v2 catchments

This spatial data set was created by the U.S. Geological Survey (USGS) to represent the basal area of red alder trees within each incremental watershed delineated in...本空间数据集由美国地质调查局（U.S. Geological Survey, USGS）构建，用于表征各逐次划定流域内红桤木的断面积。