New York City

• DSSC Guide to New York City Numeric and Spatial Data
• BYTES of the Big Apple
• DOITT GIS Data
• NYC Data Mine

New York State

• Cornell University Geospatial Information Repository (CUGIR)
• NYS Data Center Geography and Mapping
• NYS Department of Environmental Conservation
• NYS GIS Clearinghouse - password protected, only accessible from EDS
  • Accident Location Information System (ALIS) Data
  • Digital Orthoimagery Application

United States

• Census Boundaries
  
  • Census Bureau Cartographic boundary Files
  • Census Bureau TIGER/Line data
  • ESRI Census 2000 TIGER/Line data
  • IPUMS Geographic Tools
  • National Historical Geographic Information Systems (NHGIS)
    (shapefiles & data available from 1790-2000)
• Geospatial One-Stop Portal
• National Archive of Criminal Justice Data (NACJD)
• National Library of Medicine TOXMAP
• National Oceanic & Atmospheric Administration (NOAA)
  
  • Average wind speed (mph) table
  • Electronic Navigation Charts
  • Historical Map & chart Project (Office of Coast Survey)
  • National Climate Data Center
  • National Weather Service GIS Data Portal
  • NESDIS Near Real Time Spatial Products
  • National Wetlands Inventory
• USDA: NRCS Geospatial Data Gateway
• USGS National Map Seamless Server

World

• ASTER GDEM
• CloudMade
• FAO's Aquastat spatial data
• GeoCommunity GIS Data Depot
• Global Land Cover Facility
• ISCGM Global Mapping
• United Nations Geo Data Portal
• United Nations Second Administrative Level Boundaries (SALB)
• USGS Global Visualization Viewer
• WorldClim - Global Climate Data
• Other select resources
  
  • China Data Center Online Database
  • African Marine Atlas
  • Eurostat GISCO