Geospatial Standards of the USGS National Mapping Program
U.S. National Atlas
U.S. National Map
USGS Quads in PDF
FEMA Flood Maps (U.S)
Martindale's Reference Desk Cartographic Calculators
US National Wetlands Inventory
Topo Zone, the Web's first interactive topo map of the entire United States.
The Geographic Name Server located at martini.eecs.umich.edu (University of Michigan) has
crashed and will no longer be on-line.
The Geography Department at Rutgers University was hosting a new telnet Geographic Name Server at geogns.rutgers.edu, port 3000, but that's dead now also.
MIT has an interface to the old martini server data.
The Getty Thesaurus of Geographic Names can even find "neighborhoods", vernacular and historic names, worldwide.
The U.S. Census Bureau Mapping and Cartographic Resources
USGS NMD GNIS [Geographic Names Information System] can also locate topographic features.
NIMA (now NGIA) GEOnet Names Server provides GNIS features for the rest of the planet.
Here's a service to use the GNS to compute distance between two points
the Online Map Creation Site
CIA World Fact Book
Watershed Mapping from the EPA
National Geographic Society's Map Machine
US National Park Service Cartographic Resources
Canadian National Atlas
not interactive, but Terminal Maps of US Airports
USGS Quads in Digital Formats from:
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