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Africa terrestrial ecosystems were modeled using a biophysical stratification approach based on mapping the major structural components of ecosystems. New 90 meter base resolution continental datasets were developed for several key physical environment datalayers including coastlines, land surface forms, surficial lithology, and bioclimates. These unique physical components, considered as the fundamental building blocks of ecosystems, were reviewed by regional vegetation and landscape ecology experts and used in a classification and regression tree (CART) inductive model to map intermediate scale Africa terrestrial ecosystems. In the final dataset a total of 126 terrestrial ecosystem types were mapped, each with...
The USGS in cooperation with the Trinity River Restoration Program, a multi-agency group tasked with implementing federally mandated restoration, completed a geomorphic change assessment to inform the planning process for future restoration work. The ARCMAP geodatabase (v.10.0) contains geomorphic features digitized from six rectified orthophotographs (1980, 1997, 2001, 2006, 2009, and 2011). The structure of the geodatabase and methods used to delineate individual geomorphic features are described in Curtis, J.A., and Guerrero, T.M., 2015, Geomorphic mapping to support river restoration on the Trinity River downstream from Lewiston Dam, California, 1980–2011: U.S. Geological Survey Open-File Report 2015-5046....
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