HiRISE DEM's Options

[djellison]

What do you think about?

I think you should have a go yourself

I know what you mean about the colour. The sky colour is, imho, quite accurate. The ground colour is a little washed out. The simulation from here http://www.marslive.co.uk/?p=5 is a better looking product, BUT, the orientation of the sun when rendering, and when the HiRISE image was taken would contradict. The sun has to be to the west, and reasonably high, to be honest to the shading of the texture on the surface.

I'm not touching it again for a long time. I'm happy to put the 16bit PNG DEM up somewhere if you want to grab it and have a go.

Doug

[mhoward]

I'm not touching it again for a long time. I'm happy to put the 16bit PNG DEM up somewhere if you want to grab it and have a go.

I'd love to try using it... maybe in a month or two. It would be neat if it were possible to use it in MMB, with rover POV images overlayed on a modeled background. But I won't have time to even think about that for a couple months at least.

[Kevin]

I'm not touching it again for a long time. I'm happy to put the 16bit PNG DEM up somewhere if you want to grab it and have a go.

I would love to take a stab at this in a realtime stereo visualization environment. If the 16bit PNG DEM were available I could probably get something up and running in a day or two. It would be a real test for my system.

Cheers,
-Kevin

[djellison]

I prepared this for someone else - thought forum people might enjoy it

1) Install ISIS 3 - instructions here http://isis.astrogeology.usgs.gov/document...uide/index.html
2) While letting that happen - grab one of Randy's DEM's - I'm using the Victoria Crater bundle as an example
3) Find DEM_1m_VictoriaCrater.cub.gz (it's in the ISIS_EQUI360_OC folder ) and expand it
4) Run isis2raw
5) In the 'FROM' window - point to the .cub
6) Copy and paste the path and filename into 'TO' - but change the extension to .dem or something simiar
7) U16BIT data type ( screenshot attached)
8) Hit Run.... if this bit doesn't work - it's almost certainly your ISIS3 installation that needs looking at, make sure you got all the Base Data.
9) Find the .cub and open in text edit and find this part...

/* Core description */
CORE_ITEMS = (1278,1694,1)

10) Open Photoshop, and open the .dem.raw that ISIS3 produced
11) Width is the first of those three figure under CORE_ITEMS. Height is the second. Depth should be 16 bits, Byte Order as IBM PC, Header as size 0
12) Hit OK
13) Save out as 16 bit PNG, celebrate, have lunch, dump into your favourite animation package.

[djellison]

Gale Crater dem up
http://www.dougellison.com/?p=44#content

Doug

[mhoward]

OK, now that's cool.

[thare]

For those that don't want to or can't install ISIS3 I thought you might want to know how to do this using GDAL.

1.) Install FWTools (Lunix, Windows) or GDAL framework for Macs:
Linux, Windows: http://fwtools.maptools.org/
mac: http://www.kyngchaos.com/wiki/doku.php?id=...ware:frameworks
--Now I don't have experience getting these mac frameworks working. But I have heard it is easy.

once GDAL is installed and working, run:
1.) gdalinfo -stats DEM_1m_VictoriaCrater.cub (or GIS Tiff)
--note the min and max.
2.) gdal_translate -of PNG -ot UINT16 -a_nodata 0 -scale stats_min stats_max 1 10000 DEM_1m_VictoriaCrater.cub DEM_1m_VictoriaCrater_unit16.png

where
-of PNG = output format PNG
-ot UNIT16 = output type Unsgned 16 bit Int
-a_nodata 0 = Set all input NULL value to 0 on output
-scale in_min_value in_max_value out_min_value out_max_value = will apply a linear scale from input to output.
then just the input and output filenames.

That is it. It would be nice to know if this method works for anyone.

-thare

Note: I picked 10000 as the max scaled output but you may have to play with that value for your 3D app.

I prepared this for someone else - thought forum people might enjoy it

1) Install ISIS 3 - instructions here http://isis.astrogeology.usgs.gov/document...uide/index.html
...
13) Save out as 16 bit PNG, celebrate, have lunch, dump into your favourite animation package.

[djellison]

Doing an updated 2009 version of my Columbia Hills DEM. Bit of a bug in the first render, but should be finished tomorrow night.

Just got a new Core i7 860 CPU. My Q6600 has been retired to status of render node. New rig does these frames in about 35 seconds. Old rig in about 60 seconds - so I've nearly trebled my rendering power

Attached thumbnail(s)

 

[djellison]

FINISHED

http://www.dougellison.com/?p=82

Not perfect - but it's about the best I can do.

[Roby72]

Like flying around - brilliant !

Robert

[elakdawalla]

Love the dusty quality of the atmosphere. An easy post for tomorrow

--Emily

[PDP8E]

Hi Doug,

unbelievable job on the fly around! Thank you.

You say its the best you can do....but for me...that fly-around is the best I could ever dream about doing.

Cheers

[remcook]

I love how Spirit appears suddenly behind Home Plate. Very dramatic! Great job!

[imipak]

Superb.

[antipode]

on Mars, on Mars, on Mars...



Thankyou.

p