Basin of Mare Nectaris on the Moon. The Mare itself is located in the center (dark spot); basin is 2.5 times bigger. It's edge is best preserved in southwestern part, where it is called Rupes Altai. Mosaic of photos by Lunar Reconnaissance Orbiter, made with Wide Angle Camera. Size of the image is 1300×1300 km, north is up. The image has the same borders and resolution as a topographic map Mare Nectaris (GLD100).jpg.