NASA - NASA Spacecraft Camera Yields Most Accurate Mars Map

News | NASA Spacecraft Camera Yields Most Accurate Mars Map

This image shows a 90-mile-wide portion of the giant Valles Marineris canyon system. Landslide debris and gullies in the canyon walls on Mars can be seen at 100 meters (330 feet) per pixel. Credit: NASA/JPL/Arizona State University

http://www.jpl.nasa.gov/news/news.cfm?release=2010-244

どうも対象となる地球上の地形のスケール対比が難しくて諦めたのだが、火星自体は重力の関係か、地球より地形のスケールが大きいですよね。