New York
NY GIS Clearinghouse
NYS Department of Transportation GIS
Cornell University Geospatial Information Repository
Rockland County GIS
Suffolk County GIS
Ulster County GIS
Westchester County GIS
New Jersey
NJ OGIS GIS
NJ DEP GIS
NJ Department of Transportation
New Jersey Geological Survey
NJ Spatial Data Clearinghouse
Hunterdon County GIS
Monmouth County GIS
Somerset County GIS
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Connecticut
CT MAGIC GIS)
CT DEP GIS
Federal GIS & GIS-related sites
Federal Geographic Data Committee
U.S. Census Bureau TIGER map server
USG (U.S. Geological Survey)
Environmental Protection Agency GIS
Digital Atlas of NYC
PA Spatial Data Access
Massachusetts GIS
Rhode Island GIS
Vermont GIS
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