Maps of other worlds
Scale 1: 3 480 000
ATLAS OF THE MOON.
This Atlas prepared for the International Astronomical Union accompanies the Names of Lunar Formations published under its auspices.
It is founded on the measures taken for the formation of accurate lunar maps published by S.A. Saunder (Determination of Selenographic Positions and the Measurement of Lunar Photographs, 1911, reprint from R.A.S. Memoirs Vol. LX.), and by J. Franz (Die Randlandschaften des Mondes. Nova Acta. Abh. der Kaiserl. Leop.-Carol. Deutschen Akademie der Naturforscher 99, Nr. 1. Halle, E. Karras, 1913.) While the former was mainly responsible for the inner portions of the disc and the latter for the outer ones, there were yet a great number of points measured by both, and the agreement between these is in almost all cases very close, rarely differing by so much as 0´.01r.
The four inner sections were drawn by W.H. Wesley, the actual measured points being first put in by Saunder himself. (A central dot in small formations shows these points.) The ten outer sections were drawn by me after the death of both Saunder and Franz, the fiducial points being first set down from their measures. In all sections the other details were taken, by careful measurement, from the best photographs available, including several kindly supplied from Mount Wilson Observatory; sheets of the Paris 'Atlas Lunaire'; W.H. Pickering's "The Moon"; and many others from Oxford University Observatory.
The names and letters have been filled in by me, in accordance with the accompanying List of Named Lunar Formations. To avoid overcrowding of letters, a few of the Greek ones have not been entered, when the position on the wall of the crater was quite clear. Many of the rills also are not indicated. The Roman letters are not placed within the formation except when this is large, but are written (when possible) upon or close beside that part of its edge which lies nearest to the prefixed formation. When it seemed desirable, a small arrow pointing towards this formation was added. Very valuable help was given by Dr. Müller in determining the identities of formations. A few of Mädler’s and Schmidt’s were wrongly identified in the Saunder catalogue and a good many in that of Franz.
M.A. Blagg.