CTX, HiRISE, and MOC are three cameras that have provided high-resolution images of Mars. This diagram compares their typical footprint sizes across Ius and Tithonium Chasmata, Mars. Each camera's design makes different trades among resolution and areal extent. MOC on Mars Global Surveyor acquired long, skinny strips at about 6 meters per pixel. CTX on Mars Reconnaissance Orbiter provides images of the same resolution, but covering a much larger area. HiRISE, also on Mars Reconnaissance Orbiter, can take much higher resolution images at about 0.3 meters per pixel, but covers a proportionally smaller area. The base map to this image is the Viking Orbiter MDIM or global mosaic.

NASA / JPL / MSSS / Tanya Harrison