List of quadrangles on Mars

The surface of Mars has been divided into thirty cartographic quadrangles by the United States Geological Survey.

The two polar quadrangles are the largest, with surface areas of 6,800,000 square kilometres (2,600,000 sq mi) each.

[2][3] In 1972, NASA's Mariner 9 mission returned thousands of photographs collectively covering more than 80% of the Martian surface.

That year and the next, NASA's Jet Propulsion Laboratory collaborated with the United States Geological Survey's Astrogeology Research Program to assemble Mariner's photographs into the first detailed photomosaic maps of Mars.

To organize and subdivide this work, the USGS divided the planet's surface into thirty cartographic quadrangles, each named for classical albedo features within the respective regions, and the various quadrangles were assigned to geologists at USGS and at American universities for mapping and study.