I have had many requests over the years to add a USGS topographic Map overlay without the map borders. This is a huge project and I have finally decided to move forward with it.
You can read more about this project below, or skip right to the store and purchase them.
. . . → Read More: Seamless Topographic Maps for Google Earth
Seamless Topographic Map Mosaics are great for planning hiking/bicycling trips, environmental research, land use planning, and many other uses. They also make a great base map for using Google Earth in off-line mode for those times when a high speed wireless connection is not available.
The maps are available in downloadable bundles . . . → Read More: Seamless Topographic Maps for Google Earth
Update 11/28/2011 Seamless Topo Maps - I have released a seamless version (without the map borders) version of the USGS Topographic Map layer for Google Earth. In addition to removing the map borders, hill shading has been added using the 10-meter National Elevation Dataset (NED), which greatly enhances the topography and makes it possible . . . → Read More: USGS Topographic Maps