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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).
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
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
• 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)
• 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)