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HiRISE DEM's
djellison
post Apr 13 2008, 10:46 AM
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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 smile.gif

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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Bjorn Jonsson
post Apr 13 2008, 10:15 PM
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QUOTE (djellison @ Apr 13 2008, 10:46 AM) *
Just to demo how important that is for me as an animator - sliced comparisons of 8bit vs 16 bit.

In general, I find 8 bit DEMs almost useless. They can sometimes be used by converting them to 16 bits and smoothing them - I almost never use them without fairly extensive processing.
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djellison
post Apr 14 2008, 10:41 AM
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Still figuring out the best way to explore and display these dems - especially the Colubia Hills.

Meanwhile - a revisit of an idea I had some years ago using a MOC dem. This is the 'power goodness' display - lit from the north in green, the south in red. A wider angle, and a close angle.
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djellison
post Apr 15 2008, 07:33 AM
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And using the Victoria one to simulate shadowing with the sun high in the sky, and as low in the sky as it gets ( 63ish degrees )

http://www.planetary.org/blog/article/00001395/

D
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djellison
post Apr 20 2008, 07:30 PM
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I've had a hard time trying to do justice to these data sets, the Columbia Hills and the Victoria Crater HiRISE Dem's.

Here's my effort for the Columbia Hills
http://www.unmannedspaceflight.com/doug_im...bia_dem_480.mov
(4.8 meg)

Victoria Crater (with added 'rover') tomorrow
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djellison
post Apr 21 2008, 09:04 AM
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And Victoria crater

http://www.unmannedspaceflight.com/doug_im...ria_dem_480.mov

3.8 meg.

Enjoy.



D
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Stu
post Apr 21 2008, 01:07 PM
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ohmy.gif

Cooler than a penguin sat on an iceberg, sucking an ice lolly and wearing underpants full of ice. tongue.gif


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ilbasso
post Apr 21 2008, 05:27 PM
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Agree, very very cool!

All that's needed to make us happy is to tack onto the end of the movie a little video of Oppy SAFELY driving out of VC!!


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djellison
post May 5 2008, 01:14 PM
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I rendered a jumbo 4kx4k fisheye then polar-to-rectangled it back into this.

It's hard to get the rover wheels to sit on the terrain when the terrain doesn't actually appear until you render it smile.gif
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djellison
post May 15 2008, 11:24 AM
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I hope you all enjoyed the movies at full res courtesy of Emily on TPS's Blog smile.gif

I'm open to requests etc. My favorite thing to play with is lighting, this is a particularly nice shot, although it does bring out the trouble with the CCD's.
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djellison
post May 19 2008, 04:12 PM
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smile.gif

http://antwrp.gsfc.nasa.gov/apod/ap080519.html

Doug
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Stu
post May 19 2008, 04:20 PM
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Well done! About time your work on these DEMs was recognised properly.


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ustrax
post May 19 2008, 04:50 PM
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Magnifique! biggrin.gif


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nprev
post May 19 2008, 05:05 PM
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Bra-VO!!! smile.gif Superbly rendered...and appropriately recognized at last!!!



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djellison
post May 19 2008, 05:09 PM
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Just for fun, I actually have a better version on the burner right now smile.gif Clouds, sun, haze etc. Results over the next few days.
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