Stream Names Stream names were assigned from the NHD reach shapefile. Names were assigned based on...

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)