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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May 19 2008, 08:37 PM
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#2
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Founder Group: Chairman Posts: 14448 Joined: 8-February 04 Member No.: 1 |
The cliffs are a bit rounded off, just a symptom of the resolution (1m per 'pixel' for elevation) really.
And, to the very best of my abilities, they are accurate for elevation, as close as I could possibly make it. The clincher is that rendering the Columbia one from the landing site - it's a perfect replica of the success pan images of the hills. The proper movies are here - http://planetary.org/blog/article/00001423/ - although I intend to update the Columbia one later today - links later Randy Kirk got some nice emails about them, which is good because it's his hard work that made the data, and his kindness that put it 'out there' for nutters like me to play with. Doug |
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