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Geospatial Fabric for National Hydrologic Modeling, version 1.1

October 22, 2021

This U.S. Geological Survey (USGS) data release consists of two hydrographic datasets with spatial modeling units consistent with the National Hydrologic Model (NHM) Geospatial Fabric for National Hydrologic Modeling (abbreviated within this document as GFv1, Viger and Bock, 2014). The two datasets found as subpages to this landing page are 1) the GIS (geographic information system) features of the United States-Canada Transboundary Geospatial Fabric (TGF) and 2) the GIS features of the Geospatial Fabric v1.1 (GFv1.1 or v1_1) which is an update to the GF and includes the TGF. See subpages for more details.