September 28, 2020

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Quick, Here is the Map

Originally published March 24, 2011 LPOD-Mar24-11.jpg
image from LROC

The Lunar Reconnaissance Orbiter Camera team has released another tool to access and display wide angle and narrow angle camera images. QuickMap is a global map - equidistant cylindrical, and orthographic for the poles - with overlays for WAC and NAC images. The red image outlines are a nuisance (until you need them) and so the first thing I do is click the plus sign at upper right to turn them off, and then hit the minus at bottom right to turn off the index map. Double clicking anywhere on the map will zoom in to double the resolution. A Google Maps clickable scale on the left allows clicking up or down to any desired scale from 32 km/pi to 0.5 m/pi.. Once you enlarge to 32 m/pixel the NAC images are overlaid on the WAC mosaic. At any scale you can overlay the LOLA altimetry coloration, making it very easy to compare morphology with topography. I couldn't find a scale for the topo overlay - it would be fantastic to be able to click any point to determine its elevation, just as lat/long is displayed for every location. The LROC team solicits suggestions. In addition to the elevation scale one, I think it would be very useful to have a distance measuring tool, for finding the diameters of craters or boulders, and to determine the lengths of rilles and ridges. Another capability that would be quite useful would be for feature names to appear as the cursor is moved over features. This would be especially valuable for the farside, that I at least, know much less well than the nearside. QuickMap is another very valuable tool that I will use frequently. Thanks to the LROC team for providing it.

Chuck Wood

P.S.: Notice anything odd about the image above? It was mosaicked together using images illuminated from both directions. I can't tell you the name of the crater because I'd have to drag out an atlas or start another program to access that information.

Yesterday's LPOD: Come Out On the Balcony for a Better View

Tomorrow's LPOD: Hello From the Universe


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