List of quadrangles on Mercury

[1] The quadrangles are named for prominent surface features visible within each area.

[1] The remaining six quadrangles were completely unmapped by Mariner 10 and were still referred to by their albedo feature names.

Following the arrival of MESSENGER in orbit in 2011, these six quadrangles were mapped and renamed.

[2] The base mosaic used in the new maps was produced with orbital images by the MESSENGER Team and released by NASA’s Planetary Data System on March 8, 2013.

This global mosaic includes complete coverage of Mercury’s surface.