StreamStats was initially developed through a cooperative effort of the USGS and ESRI, Inc.* It is an integrated GIS application that is partly based on a combination ofArcGIS Servertechnology and theArcHydro Tools, as well as on Python scripts. Most StreamStats functionality is available as web services. StreamStats incorporates a map-based user interface for site selection; a database that contains information for data-collection stations; a GIS program that delineates drainage-basin boundaries and measures physical and climatic characteristics of the drainage basins; and a GIS database that contains data needed for delineating basins, for measuring drainage-basin characteristics, and for locating sites of interest in the user interface. GIS data needed for delineations generally were developed by integrating elevation data from the USGS3D Elevation Program, streams from theNational Hydrography Dataset, and previously determined watershed boundaries from theWatershed Boundary Dataset...
