Online Lunar Maps
Library Cataloging

Online Lunar Maps


Out of scope, but I have to mention the work done by my co-workers. The Lunar Topographic Orthophotomap (LTO) Series are now online. There will be change to the website over the next several weeks. Currently, the last image option available is the "click here to request a high-res image (Requires JPEG 2000 viewer)" We will be replacing this line with a direct link to the JPEG 2000 map image. The Web team will be replacing the link at the rate of 5-10 per day depending on the internet traffic.

The Lunar Photo of the Day gives the work a glowing review.

Once again, quietly and without fanfare, the Lunar & Planetary Institute has delivered a magnificent collection of rare lunar maps for our daily use. The Lunar Topographic Orthophotomaps - the absolutely best lunar maps ever map - are 1:250,000 scale Apollo Metric photos overprinted with accurate topographic contours at 100 m vertical intervals. LPI has released digitized versions of 215 LTOs at 4 resolutions: a browse image; a 72 dpi, 2.7 MB image; a 150 dpi, 10 MB image; and a high res image that is so big you have to request LPI puts it on a ftp server for you. I browsed through many images (and already downloaded 3 of the 150 dpi ones - I need that res to read all the contours) to remind myself of what they show. At the top left corner of the index map shown above is a small piece of 41-A4 map of the Beer and Feuille area southwest of Archimedes that gives a degraded view of the large scale and contour density. As the coverage map shows, only the areas under the Apollo 15, 16 and 17 flight paths had stereo coverage allowing topography to be derived by photogrammetry. But this area includes many interesting features, including the rugged dome Cauchy Tau, which is seen to be 342 m high, quite a bit taller than the previous best estimate of 149 m derived from the less accurate photometric method. Most of these LTO maps were published in 1974, so 30 years later, enjoy them and thank LPI for their tremendous effort in digitizing and placing these treasures online!




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