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3D Maps from LOLA Data
joertexas
post Feb 16 2011, 01:10 AM
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QUOTE (JohnVV @ Feb 15 2011, 03:37 AM) *
what lola file are you using
-- remember the lbl must ALSO be there for it
the "ldem_16.img WITH the REQUIRED ldem_16.lbl in the same folder is the MAX the biggest full globe that can be opened with 8 gig of system ram on a 64 bit OS
and that will take a lot of time to open

the ldem_4.img & ldem_4.lbl combo is the recommended for the full globe
ftp://pds-geosciences.wustl.edu/lro/lro-l...ylindrical/img/



LDEM_875N_10M.IMG, and I do have the LBL file in the same directory.

JR
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JohnVV
post Feb 16 2011, 01:12 AM
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for the time being it only works for the Simple cylindrical spherical maps
from the folder i posted
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ValterVB
post Feb 16 2011, 08:38 PM
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joertexas, you have used a polar img. In polar we haven't the
WESTERNMOST_LONGITUDE = 'N/A' and the
EASTERNMOST_LONGITUDE = 'N/A'.

If you add it, probably you can import the data:
WESTERNMOST_LONGITUDE = 0 <deg>
EASTERNMOST_LONGITUDE = 360 <deg>

Just now I'm downloading a polar file for test it.
News about this more later or tomorrow.

Ciao
VB
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joertexas
post Feb 17 2011, 01:25 AM
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Thanks for your help, and thanks also to everyone who has replied to me :-)

JR
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joertexas
post Mar 6 2011, 04:28 PM
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QUOTE (ValterVB @ Feb 16 2011, 02:38 PM) *
Just now I'm downloading a polar file for test it.
News about this more later or tomorrow.

Ciao
VB


Did you have any luck with the polar IMG files?

JR
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Engineer817
post Apr 4 2012, 07:23 PM
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I'm a little new here, but I have been working with .img files for a little bit and have some questions. I've been working on a project to make 3d maps of the lunar northern pole and have used Jim Mosher's PDS .IMG Reader to get the grey height maps I needed. I then uploaded that into an engine called Unity 3D. Problem is the data is messed up a little. I was told some one here had found a soulution to the stitch lines seen here:
http://i1267.photobucket.com/albums/jj557/...pg?t=1333152988
Most of what I've worked with in the way of pictures can be seen here: http://s1267.photobucket.com/albums/jj557/engineer817/, but I think that its pretty self explanatory. I need a way of getting rid of these stitch lines. I've started studying gimp and its library of functions and am planing on finding the edges, deleting them then taking averages from either side of the problem area and making an average slope to fill in the blanks. I know that the problems are about 50 meters across as they are 10 pixels, at 5m/pxl, so I am not sure about the result it might be. still it would save me some work if there was a process already made. I guess I'm just wondering if any one has any advice for this project. Thanks.
cool.gif
also wondering what a dynamic page is. it won't allow the pictures to be inserted for that reason.


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What Will It Take?
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JohnVV
post Apr 4 2012, 10:27 PM
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Engineer817
that is NORMAL the LOLA data is laser points .Only about 10% of the moon is covered so the rest is interpreted using a spline fit
If you search here and over at Shatters.net( celestia site) i did a LOT of reprocessing of the laser points
http://www.shatters.net/forum/

the LRO WAC-DTM stereo topographic is much better
http://lroc.sese.asu.edu/data/LRO-L-LROC-5...TA/SDP/WAC_DTM/
I use the LRO data set now


QUOTE
I've started studying gimp and its library of functions and am planing on finding the edges,

DO NOT !!!!! use gimp on 16 bit data !!!!!!!!!!!!!!!!!!!

gimp is 8 bit ONLY !!!!! you will kill all the information in the 16 bit gray images
8 big gray = 256 tones ( gimp )
16 bit = 65538 tones
also the LOLA data is in 16 bit SINGED LSB format
-32767 to 32768

if you must there is a 32 bit program ( gimp plugin is 8 bit ONLY) called G'mic
http://gmic.sourceforge.net/index.shtml
the TERMINAL version is 32 bit
the gimp plugin is 8 bit ONLY

the terminal is what i used to reprocess the laser point data after importing the PDS data using ISIS3
http://isis.astrogeology.usgs.gov/index.html
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mhoward
post Apr 4 2012, 11:54 PM
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Engineer,

You should be looking at the relatively new LRO WAC Digital Terrain Model (DTM) data. I can't help you with reading it, but it's pretty much just integer values, similar to the gridded LOLA data. It has a few problem areas of its own, but it is smoother and higher resolution than the gridded LOLA data; pretty impressive actually.
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Paolo
post Jun 20 2012, 06:43 PM
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just out in the latest Nature, a paper on LOLA results on the polar Shackleton crater: Constraints on the volatile distribution within Shackleton crater at the lunar south pole
full article requires subscription


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I'm one of the most durable and fervent advocates of space exploration, but my take is that we could do it robotically at far less cost and far greater quantity and quality of results.

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