How can I extract the coordinates from an existing LROC image to search for that area in the LRO Image Search Tool?
What coordinates should I enter in this example?
Example image:
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$\begingroup$ Welcome to Space! It's an interesting question. Next time don't forget to add links to the pages that you are referring to. The more information and detail you can add to your question, the better the chances that you'll receive a helpful answer. Thanks! $\endgroup$– uhohMar 6, 2019 at 22:34
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$\begingroup$ I assume you want to know how to enter the long/lat data on the right side into the fields on the left side? Or did you want to know something else? $\endgroup$– HobbesMar 7, 2019 at 10:20
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1 Answer
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The LROC data specification has information on how the images are labeled.
The LROC derived products are compatible with the recommendations of the LRO Data Working Group [8] and draft recommendations and mapping conventions identified by the LGCWG (the Lunar Geodesy and Cartography Working Group) [9]. The coordinate system used is the mean Earth/polar axis system, and using planetocentric latitude and east positive longitude direction. The planetocentric latitude is the angle from the equator to a point on the surface of an oblate planet. The longitude increases from west to east (left to right on an Equirectangular projection).
The MAXIMUM_LATITUDE element specifies the northernmost latitude of the map.
So longitude increases going East, negative longitudes are West. Positive latitudes are North, negative latitudes are South.
LRO images are pretty big, so the long/lat figures you enter in the Search box depend on what feature of an image you want. If it's the whole image, use the Center long/lat figures.
If you're looking for a specific region within the image, try to estimate the long/lat of that feature by measuring the image.
