It's June - Better LOLA? |
It's June - Better LOLA? |
Jan 22 2011, 12:51 AM
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#61
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Member Group: Members Posts: 399 Joined: 28-August 07 From: San Francisco Member No.: 3511 |
Here's a little something... LOLA_diagnostic_illumination_whole_11K.jpg (11520x5760 pixel JPG image; 27MB) Well worth the wait! Thanks! -------------------- 'She drove until the wheels fell off...'
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Jan 22 2011, 01:18 AM
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#62
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
lighting from 45 deg up ( the basic "emboss" filter ) is the best way to view 16 bit height data
it was the only way i could find to easily show it soon i am going to have to update my normal map what did you use to destrip it |
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Jan 22 2011, 01:43 AM
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#63
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Solar System Cartographer Group: Members Posts: 10227 Joined: 5-April 05 From: Canada Member No.: 227 |
Fantastic image! Thanks. This is going to be a fantastic dataset.
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 22 2011, 02:11 PM
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#64
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Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
what did you use to destrip it I'm not positive what you mean by destrip, but if you mean removing the vertical banding artifacts, that's why I went back to the source, the RDRs - to generate the map using a modified kriging technique with some different parameters. The image above is the resulting surface normal map Also - and for me this is the "neato" part - I'm generating the surface normal map directly from the RDRs, which gives a more precise result than generating it from the gridded height map. I was pleased - and more than a little surprised - to see how precisely the resulting surface normal map matches up with the Clementine version 2 base map, in most areas. Computationally expensive to do - and took quite a long time to work out - but worth it. |
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Jan 22 2011, 02:42 PM
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#65
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Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
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Jan 22 2011, 05:35 PM
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#66
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Solar System Cartographer Group: Members Posts: 10227 Joined: 5-April 05 From: Canada Member No.: 227 |
"I was pleased - and more than a little surprised - to see how precisely the resulting surface normal map matches up with the Clementine version 2 base map, in most areas."
And remember that it's the Clementine map that is wrong if there's a difference. Clementine control, based on a patchwork quilt of thousands of images, will be greatly inferior to this dataset. LOLA is going to be our ultimate lunar control system. 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 22 2011, 06:07 PM
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#67
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Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
And remember that it's the Clementine map that is wrong if there's a difference. Yes, I've kind of discovered that the hard way Except: I suspect now that some of the surface normal maps that have been generated may have slight but problematic offsets, because of the way they're derived from the gridded height map. My previous ones certainly did. |
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Jan 22 2011, 08:11 PM
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#68
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Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
For fun, here is the illumination map from above generated from LOLA data, combined with the Clementine map. So basically: the Clementine map with the lighting synthetically shifted to the right to bring out the topography more. The image comes in
LOLA + Clementine lunar map - Preview Size (5760x2880 pixel JPG; 8.9MB) LOLA + Clementine lunar map - Large (11520x5760 pixel JPG; 30.8MB) LOLA + Clementine lunar map - Extra Large (23040x11520 pixel JPG; 92.5MB) |
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Jan 22 2011, 09:49 PM
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#69
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
QUOTE but if you mean removing the vertical banding artifacts that is what i meant . the processing of the rdr data the gdr is very banded QUOTE And remember that it's the Clementine map that is wrong if there's a difference i found that out with the kaguya data .Kaguya lines up well with LOLA. But most of the Clementine map is "predictably " off .An over all warp brings most of it into alignment. However some small areas are just off by what looks like a random amount ( +- 5 to 20 pixels ) |
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Jan 22 2011, 11:43 PM
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#70
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Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
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Jan 23 2011, 08:04 AM
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#71
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
no kidding it is a big file
the *.dat's alone would be a bit much then rdr2csv and filter that to the required data I was looking in to doing that but the overall drive space required is more than i could do |
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