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: 14434 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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Jan 21 2010, 02:35 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 |
-------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Jan 21 2010, 01:29 PM
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#3
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Member Group: Members Posts: 713 Joined: 30-March 05 Member No.: 223 |
Is this news? Absolutely phantastic !! This must be the *perfect* complement for my single-image shape-from-shading (SFS) based DEMs. While the SFS-DEMs provide real 3D detail down to the single-pixel level (i.e. without "draping" of the high-res 2D image over the terrain) it is unfortunately not very accurate in the mid- and large scale variations. ... but this is just where the HiRISE DEMs seem to be impressively accurate... so one of the next things I would like to try is to combine the high-frequency SFS-based 3D details with the accurate low-frequency variations of the published HiRISE DEMs. ... the result should be really interesting. |
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