The first hiking maps of Mars |
The first hiking maps of Mars |
Guest_AlexBlackwell_* |
Feb 12 2007, 06:12 PM
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Aug 25 2007, 04:56 PM
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Solar System Cartographer Group: Members Posts: 10157 Joined: 5-April 05 From: Canada Member No.: 227 |
I didn't notice this discussion at the time, so here goes...
USGS made topo maps from Mariner 9 and Viking data. Global maps were from very sparse and weak data - like atmospheric density estimated from occultations. Local details could be go from stereo images - very few in Mariner 9 data, lots in Viking. But stereo is no good globally for a big place like Mars (the orientation of the stereo model is not constrained), so topo was still poor for Viking. Nevertheless, global maps at 1:25 million and 1:15M were compiled, and the 1:5M sheets had a topo version as well. For Viking, 1:2M topo was produced for some sheets of the 120-sheet series. Viking landing site maps included topo at 1:250K. But only with MOLA did we get good topo globally. And we still lack it for the Moon. 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 PD: 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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