Source: USGS

As of June 4, 2007, the USGS will be releasing selected Landsat 7 image data of the United States through the Web (glovis.usgs.gov or earthexplorer.usgs.gov). These data are of high quality with limited cloud cover.

This Web-enabled distribution of new and recently acquired data is a pilot project for the Landsat Data Continuity Mission (LDCM), currently projected for launch in 2011. The project will allow the Landsat data user community to help refine the distribution system planned for the upcoming LDCM. Each scene will be registered to the terrain, or “ortho-rectified,” prior to being placed on the Web. Copies of these data will also be available on CD or DVD at the cost of reproduction.
Landsat data have proven useful for a wide range of applications. From disaster monitoring after Hurricane Katrina and the Indonesian tsunami to global crop condition analysis, Landsat data are being used by scientists around the world. The Web-based distribution system will allow the user community easier access to Landsat 7 data.
The pilot project will be carefully examined. Customer response will be
evaluated and their insight will influence the future distribution system.