LUNAR ORBITER IV | NEARSIDE OF THE MOON WITH A VIEW OF SCHICKARD CRATER, THE MARE HUMORUM, AND THE OCEANUS PROCELLARUM, TAKEN 11-26 MAY, 1976.

See Bowker & Hughes, Lunar Orbiter Photographic Atlas of the Moon

A Dramatic image of the lunar disc, with Schickard Crater visible in the center, the Mare Humorum to the right, and the dark Oceanus Procellarum at upper edge. 

Lunar Orbiter IV flew in high altitude polar orbits with the primary objective of mapping the near side of the Moon in high resolution, with 100% of the nearside being photographed, and 95% of the farside. A 40 by 45 foot mosaic was created at NASA's Langley Research Center using the images taken by the Lunar Orbiter IV, and visitors were allowed to stand or crawl over it. The mosaic was used to determine the sites to be photographed in higher resolution by the Lunar Orbiter V.