HiRISE DEM's |
HiRISE DEM's |
Apr 13 2008, 10:46 AM
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#1
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Founder Group: Chairman Posts: 14448 Joined: 8-February 04 Member No.: 1 |
Late last week I stumbled upon a few HiRISE derived DEM's (Randy Kirk works his magic once again!)
http://webgis.wr.usgs.gov/ftphirise/index.jsp (URL now down) I'm working on both Vic Crater and the Columbia Hills. Fortunately, now I've got a Mac, I can use ISIS. I've figured out a fairly simple flow ( isis2raw as 16 bit unsigned, and then imported into Photoshop ) to take DEM CUB's and make 16 bit PNG's Just to demo how important that is for me as an animator - sliced comparisons of 8bit vs 16 bit. A busy week unfortunately, but animations of various sorts are in the pipeline. |
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Sep 25 2009, 04:06 AM
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#2
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
I haven't tried to work with the DEM data at all, so this is a shot in the dark, but my first question would be: is the file 16-bit, and if so, is all the data down in the first 12 bits? That's one reason things can look black in Photoshop. Check Image > Adjust > Levels and see if the histogram shows anything at all.
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Sep 25 2009, 04:16 AM
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#3
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Newbie Group: Members Posts: 19 Joined: 17-June 09 Member No.: 4825 |
The file is 16-bit. And the histogram seems to be blank.
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