3D Maps from LOLA Data |
3D Maps from LOLA Data |
Feb 16 2011, 01:10 AM
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#16
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Newbie Group: Members Posts: 17 Joined: 30-January 11 Member No.: 5787 |
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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Feb 16 2011, 01:12 AM
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#17
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
for the time being it only works for the Simple cylindrical spherical maps
from the folder i posted |
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Feb 16 2011, 08:38 PM
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#18
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Newbie Group: Members Posts: 18 Joined: 27-February 10 From: Italy Member No.: 5235 |
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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Feb 17 2011, 01:25 AM
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#19
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Newbie Group: Members Posts: 17 Joined: 30-January 11 Member No.: 5787 |
Thanks for your help, and thanks also to everyone who has replied to me :-) JR |
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Mar 6 2011, 04:28 PM
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#20
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Newbie Group: Members Posts: 17 Joined: 30-January 11 Member No.: 5787 |
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Apr 4 2012, 07:23 PM
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#21
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Newbie Group: Members Posts: 2 Joined: 22-March 12 Member No.: 6366 |
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. also wondering what a dynamic page is. it won't allow the pictures to be inserted for that reason. -------------------- What Will It Take?
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Apr 4 2012, 10:27 PM
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#22
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Member Group: Members Posts: 890 Joined: 18-November 08 Member No.: 4489 |
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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Apr 4 2012, 11:54 PM
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#23
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Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
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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Jun 20 2012, 06:43 PM
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#24
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Senior Member Group: Members Posts: 1729 Joined: 3-August 06 From: 43° 35' 53" N 1° 26' 35" E Member No.: 1004 |
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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