GIS References

Commercial Sources

• American Digital Cartography, Inc. (DLG basemaps by county & more)
• Census 2002 TIGER Files
• Hydrosphere Data Products (USGS, NCDC, EPA STORET)
• ESRI GIS Data
• Geography Network
  
• GIS Data Depot - Free & Pay-per-download GIS Data
• MrSID Stand-alone Viewers
  • MrSID Viewer
  • MrSID GeoViewer:

Downloadable Data Sources

DRGs & DEMs

• 7.5 Minute DEM Index Map (US)
• NYS 7.5minute DRG Index
  • By Map
  • By Quad Name

General Data Sources

• Better Assessment Science Integrating point and Nonpoint Sources Data (BASINS)
  
• Cornell University Geographic Information Repository (CUGIR)
  
• Federal Geographic Data Committee
  
• NY GIS Clearinghouse
  
• National Atlas of USA
  
• National Geospatial Data Clearinghouse
  • EPA
  • USGS
• USGS Geographic Data Download
  
• USGS National Gap Analysis Program
  

Land Use Data

National Land Cover Characterization Program (NLCD)

Soils

• State Soil Geographic Database (STATSGO)
  
• Soil Survey Geographic Database (SSURGO)
  

Wetlands

• NWI Wetland Maps
  

Information Sources

• ESRI Virtual Campus
  
• NEARC Northeastern ARC Users
  
• Other GIS Sites (International, etc.)

NYS CDEA GIS Support Page