1. Stream Names Stream names were assigned from the NHD reach shapefile. Names were assigned based on the most prevalent name within a basin (based on stream length). Thus, the name assigned may not be the name of the main stem. ***Important***: These names are a starting point--they MUST be checked for accuracy and changes/additions should be made as necessary. There may be more than one NHD reach corresponding to each DEM-derived stream reach. Not all NHD reaches are named (red reaches show those with names).

2. GIS Data Sources AWIPS Map Database Catalog –http://www.nws.noaa.gov/geodata Contains numerous GIS data sets –County Warning Areas and Zone Forecast Areas –RF1 rivers and streams –Counties, cities and urban boundaries TIGER (Topologically Integrated Geographic Encoding and Referencing system) –http://www.esri.com/data/download/census2000_tigerline/index.html roads, hydrography, landmarks, etc. 2000 data available available by county for each state data is in decimal degrees available in shapefile format

3. GIS Data Sources (continued) National Atlas –http://www.nationalatlas.gov Numerous data sets for free download via FTP. Most data is in shapefile or SDTS format National Geospatial Data Clearinghouse –http://nsdi.usgs.gov Contains links to some of the above information with additional links to USGS-specific information such as water and geologic information Geography Network –http://www.geographynetwork.com some of the data can be viewed directly if the user has the free ESRI GIS utility ArcExplorer or ArcGIS 8

4. EROS Data Center –http://edc.usgs.gov Digital Line Graphs (DLGs) –obtained via FTP –vector representations of USGS topographic map information –SDTS format GIS Data Depot –http://data.geocomm.com GIS repository –TIGER/Line Files (2000) –USGS Quad Grids –Time Zones/Zip Code Data GIS Data Sources (continued)

5. Geographic Names Information System –http://geonames.usgs.gov Developed by the USGS in cooperation with the U.S. Board on Geographic Names Text files of federally recognized names for ~2 million physical and cultural geographic features in the U.S. –Located by state, county, and geographic coordinates –Can be manipulated to a comma delimited format for import in ArcView GIS Data Sources (continued)