LUNAR ORBITER IV
MOUNTAINS AND CRATERS SURROUNDING THE MARE ORIENTALE, TAKEN 25 MAY, 1967.
Vintage NASA Langley Research Center, Army Map Service, Corps of Engineers telephoto panorama, made up of three silver gelatin contact prints, each approx 17 1/2 x 23 inches, of Lunar Orbiter images IV-187H1-3, each image with detailed image information printed in lower margins.
The Mare Orientale, or Eastern Sea, is located on the western border between the near and far sides of the moon. It is distinguished by large, concentric rings, created by the impact of an asteroid-sized object. The surrounding area is covered in smaller impact craters and concentric ranges.
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.
See Bowker & Hughes, Lunar Orbiter Photographic Atlas of the Moon; Cortwright, Exploring Space with a Camera, pp 108-113