Stream Names

1
Stream Names
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).

• 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.
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_tiger
  line/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
GIS Data Sources (continued)

• 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

5
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