Data Source Type of data Notes CUGIR (Cornell University) CUGIR provides geospatial data and metadata for New York State, with special emphasis on those natural features relevant to agriculture, ecology, natural resources, and human-environment interactions.   NYS GIS Clearinghouse GIS data by county including ortho-imagery   USDA Maps, imagery, data, and links covering a broad spectrum of data related to natural resources and conservation. Geospatial One-stop A "one-stop" for finding GIS data and maps.  Browse by themes, links to many government maps, and more.   Historic Aerials HistoricAerials.com provides free online access to historic and current aerial photography. You can view aerial photography from the 1930s through today. Use multi-year comparison tools to detect changes in property.   Google Earth Google Earth (KML) tour gallery   National Atlas DATA Raw data downloads ranging from people, transportation, & agriculture to boundaries, climate, and more.   Map Collections Library of Congress historic map collection spanning from 1500 to 1999. Check it out!  Cities & towns, military battles, transportation & communication, conservation & environment, cultural landscapes, and discovery & exploration.   Ready to use maps! Google Earth & GE Mashups Index GIT Ahead index of cool Google Earth tours and mashups for educators.  This is worth checking out!   Census 2000 Data Free census 2000 data from all 50 states Terra Server Searchable high quality aerial photo imagery for the USA   Finger Lakes GIS data sets GIT Ahead and the Finger Lakes Institute are dedicated to providing easy access to GIS datasets for the Finger Lakes region. (projected in UTM Zone 18, NAD83)   National Atlas Viewer with data layers Easy to use data viewer to make maps with a larger variety of clickable layers.  EXCELLENT Site!   EarthKAM ISS EarthKAM is a NASA sponsored program that provides stunning, high quality photographs of our planet taken from the Space Shuttle and International Space Station.