TNRIS staff created this image to illustrate the Upper Devil's River watershed, which spans across more than 3500 square miles and covers parts of Crockett, Shleicher, Sutton and Val Verde County.
The watershed is represented by the USGS Water Shed Boundaries Dataset (WBD) Upper Devil’s River Huc 8 sub-basin.
The WBD is a seamless and consistent national Geographic Information System (GIS) database at a scale of 1:24,000, which has been extensively reviewed and matches to a minimum the USGS topographical 7.5 minute quadrangle map series.Category: Hydrography
The extensive water network seen is represented in blue by the National Hydrography Dataset (NHD).
The National Elevation Dataset (NED) was used for elevations and is represented by the color ramp showing low areas in red with higher elevations in green.