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Zentralbibliothek Zürich: Map Department
ETH -Bibliothek: Maps
map.geo.admin.ch
Ryhiner collection, memory of the world (historic maps)
Topozone: Free USGS Topo Maps for the Entire United States
National Geographic Maps
Google earth
Google maps
Zoom Earth: new satallite images every day
Map.search.ch
bing.com: maps
UN Maps of the world
Worldatlas
Historische Karten
David Rumsey Historical Map Collection