Martian Cartography |
Martian Cartography |
May 15 2006, 04:16 PM
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#1
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Member Group: Members Posts: 147 Joined: 14-April 06 From: Berlin Member No.: 744 |
I have recently freaked out a little bit about Martian maps of all sorts. And finally I was astonished with those highly detailed beauties that I list below. Nonetheless. some of them have huge inconsistencies (crater names) easily noticed when we compare the surroundings of Gusev crater. Enjoy:
http://www.ralphaeschliman.com/ http://planetologia.elte.hu/1cikkeke.phtml...arsmapinte.html http://pubs.usgs.gov/imap/i2782/ -------------------- |
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Jan 9 2019, 04:58 AM
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#2
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Solar System Cartographer Group: Members Posts: 10226 Joined: 5-April 05 From: Canada Member No.: 227 |
I don't know, but I looked at the traverse map in Analysts Notebook and it matches the background map properly. That map is in a cylindrical projection. It might be that cylindrical projection data have been mapped straight onto the GE globe without correction.
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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Jan 11 2019, 12:14 PM
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#3
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Member Group: Members Posts: 349 Joined: 20-June 07 From: Slovenia Member No.: 2461 |
I don't know, but I looked at the traverse map in Analysts Notebook and it matches the background map properly. That map is in a cylindrical projection. It might be that cylindrical projection data have been mapped straight onto the GE globe without correction. Phil First of all, thank you Phil very much for your attention, I was really hoping for your answer. Yes, the Analyst's track aligns perfectly with HiRISE imagery as well as with stereo DTM's in Equirectengular Cylindrical Projection using Mars2000 sphere. What does not align are Opportunity tracks (and other Mars data) I originaly got in KML format. The first picture illustrates the point. Even when the track is reprojected from basic WGS84 to Mars2000 sphere datum, KML track still won't align. And vice versa. When I load SHP Analyst's track into GE Mars, it is off by about 200 meters (second picture), but all KML based data aligns nicely. It appears to me the problem lies with the the fact the apparently unknown datum other than WGS84 or Mars2000 Sphere is used by Google Mars, and so the transformation does not work out. For Curiosty rover I only have Fernando Nogal's excellent track in KML and am not sure how well it aligns when reprojected onto EC Mars2000 Sphere map Is it in the right place or is off by the same amount as the other KML Mars data? Thank you in advance, Jack |
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