New map of Phobos |
New map of Phobos |
Mar 10 2010, 10:25 PM
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#1
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
I'm starting a thread here in Mars Express for a new map of Phobos, because most of it will be based on MEX images.
This is the first section. It's the north pole, centred on the pole, out to 50 degrees north at the edge, in azimuthal equidistant projection (i.e. the parallels of latitude are equally spaced, unlike in a stereographic projection where they would get further apart away from the pole). This image is made of Viking, Mars Express and MRO images. Below it I show what the previous best map looked like, much more compressed to save space here. That is just Viking data, compiled by Damon Simonelli et al. at Cornell in the 1990s. The actual mapping is done at twice this scale. Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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May 20 2010, 02:19 PM
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#2
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Solar System Cartographer Group: Members Posts: 10229 Joined: 5-April 05 From: Canada Member No.: 227 |
Here I have reprojected the complete Phobos mosaic from the Cornell control network to that of the recent DLR maps - you can see their maps and data including a shape model here:
http://europlanet.dlr.de/node/index.php?id=214 There are some problems in their map - bad joins between images etc. - and attempting to reproject the original mosaic to fit a problematic base image is never going to produce a perfect match. However, their recalculated pole positions and improved shape in some areas probably make positions on tghis version a bit more reliable. Overlay this over the previous one to see just how much features move between them... Anyway, if somebody was using the DLR shape for visualization, this is the version of the mosaic that should be used with it. Phil new mosaic: I am now going to wrap all this stuff up with documentation and send it in to PDS. -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke Maps for download (free PDF: https://upload.wikimedia.org/wikipedia/comm...Cartography.pdf NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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