GIS:  Geographic Information Systems

GIS Data:

GIS.com
Arc Data from ESRI
Geography Network
GIS Date Depot

Topos:

TopoZone
myTopo
LandInfo

Aerial Photos/Satellite Imagery:

TerraServer
SpaceImaging
Landsat
Spot

Government Agencies/Academia:

National Atlas
National Spatial Data Infrastructure
USGS National Mapping Program
USGS Spatial Data Sets for Water
National Park Service
U.S. Fish and Wildlife Service
EPA
U.S. Forest Service (for actual data, go to a specific National Forest web page)
GIS Center at Radford

Demo Sites from GIS Presentation

Salem Village
TimeMap
TimeMap Example:  Korea

 

Please feel free to submit a site for inclusion on this list: SUBMIT