HiRISE DEM's |
HiRISE DEM's |
Apr 13 2008, 10:46 AM
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#16
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Founder Group: Chairman Posts: 14433 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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Feb 3 2010, 02:17 PM
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#17
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Junior Member Group: Members Posts: 59 Joined: 18-July 07 From: London, UK Member No.: 2873 |
This was raised over in the Opportunity distant vistas thread, but I think this is probably the better home for it.
After helping Doug make the Pathfinder DEM, we were trying to figure out how well it matched up with the panorama from on the ground (suspiciously well!). So using the same method as in the other thread, here's my attempt at trying to show the distant features that show up for something about 1.5 m off the deck at Pathfinder's location. Here's a hillshade basemap of the DEM, with a colour map overlain. I had to stretch the colour to show off the subtle topography at Pathfinder, hence the cut-off at big crater. You can also see the only error in the whole DEM near the top. The red dot is Pathfinder. And here's basically the visibility of that DEM from Pathfinder. Same colours as before - green is visible, red is not. Twin peaks and big crater show up quite nicely. Pete |
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