Internet GIS - Basemaps Plus

We're calling this category of Internet geographic information systems "Basemaps Plus". The implication is that they include some generic feature data (hydrography, roads, county/state/national boundaries, etc) in addition to typical basemaps (orthophotos, topographic maps, elevation models, etc). These sites can be very useful for on-screen exploration and simple map-making projects.

Wisconsin Basemaps Plus

Wisconsin DNR WebView is a geographic information system that provides access to a nice variety of the DNR's databases 
http://dnrmaps.wi.gov/imf/imf.jsp?site=webview

US Basemaps Plus

The National Map Viewer, hosted by the US Geological Survey, is a geographic information system devoted to simple data diplay and map-making. 
http://viewer.nationalmap.gov/viewer/

National Atlas Map Maker, authored by the staff of the National Atlas of the United States is a geographic information system devoted to simple data diplay and map-making. 
http://www.nationalatlas.gov/mapmaker

World Basemaps Plus

Bing Maps http://www.bing.com/maps/

Google Maps http://maps.google.com/