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LOLA PDS release #5
Mars3D
post Mar 11 2011, 09:58 PM
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QUOTE (joertexas @ Mar 10 2011, 11:39 PM) *
I've been looking for a 3D map of the lunar north pole, specifically, a 30km radius centered at 89.55N 30W. I've downloaded the LOLA files and viewed them with LTVT, but that's as far as I've gotten with it.

Is your software an adaptation of something that's available online, or is it a custom program?

JR


It's a custom program.

Here's a map of the area you mentioned.

Here's another map of the north pole showing a larger area (with exagerated lighting)
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JohnVV
post Mar 11 2011, 10:09 PM
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joertexas

seeing as these IMG files ( the lola img)are RAW images with NO image information in them
The information is in the lbl ( label) file
you open them with the appropriate PDS software or as a RAW image
and you get the image size from the lbl label

and img2png will do this
Photoshop will even open the raw image ( though the singed format might be an issue )
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joertexas
post Mar 11 2011, 11:05 PM
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I can't get img2png to start, but I was able to create a png file with Irfan. Is this what I need to do?

My computer doesn't have the memory to open the resulting file in Integrated Data Viewer, so I'm not able to check if it worked.

JR
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joertexas
post Mar 11 2011, 11:08 PM
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QUOTE (Mars3D @ Mar 11 2011, 03:58 PM) *
It's a custom program.

Here's a map of the area you mentioned.

Here's another map of the north pole showing a larger area (with exagerated lighting)


Those are fantastic! Much better than what I've seen - even the LROC images don't do the terrain justice. smile.gif

JR
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Mars3D
post Mar 11 2011, 11:40 PM
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JOE & 3D *** YOU DON"T NEED TO QUOTE THE COMMENT IMMEDIATELY PRECEDING YOURS ****


Thanks, I should point out that for the second image the terrain was scaled vertically by a factor of two.
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joertexas
post Mar 12 2011, 10:45 PM
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I thought that second image looked a little lumpy compared to the other one. Now I know why smile.gif

Again, great pics. If you decide to produce any low angle 3D images, that'd be wonderful, too biggrin.gif

JR
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Jim Mosher
post Mar 14 2011, 04:51 PM
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JR,

You indicated earlier that you had already studied the LOLA DEM data with the Lunar Terminator Visualization Tool, so this is probably redundant with views you have already seen, but I am attaching some screenshots anyway. You can reproduce any of them using the input data recorded at the top and bottom of each.

Your point of interest seems to be centered on the rim of Hinshelwood. These are perspective views looking north along the 30W meridian from an Earth-like distance (since that is what LTVT is hardwired to do), and with the sun angle artificially elevated to one higher than is ever actually achieved (by setting the solar latitude to 5N).

The first view (on the left) was constructed at 240 m resolution with LOLA LDEM_75N_240M.IMG, and indicates what is apparently your 30 km diameter region of interest. The second view was made using the latest 20 m DEM (LDEM_875N_20M.IMG), but with a 100 m step size. Note that what looks like the lunar limb at top is actually not the limb, but rather the edge of the data set. The final view zooms in 5X to the full 20m resolution, but exhibits numerous rows of artifacts where I assume the data was interpolated between ground paths.

With a little patience you should be able to manipulate the sub-observer and sub-solar points to generate views from different directions or with different lighting. It is also possible to use the scripting capability to generate a sequence of views which can be assembled into an animation or fly-over (either in lighting or position, or both).

Hope this helps.

Jim
Attached thumbnail(s)
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Bjorn Jonsson
post Mar 14 2011, 08:04 PM
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QUOTE (zeBeamer @ Feb 25 2011, 06:50 PM) *
It'd be great also to know how this community is using the LOLA data, so please reply if you do:
1- Experimental Data Records (EDR) [raw telemetry]
2 - Reduced Data Records (RDR) [altimetric profiles]
3 - IMG Gridded Data Records (GDR) [maps]
4 - JP2 Gridded Data Records (GDR) [maps]
5 - Celestia Virtual Textures

I'm using (3), i.e. the LDEM*.IMG files. I did the experimental animation below from the new data release showing a flight above the Moon; the altitude is 700 km. In this case I'm using the 128 pixels/degree data which is sufficient at this altitude, field of view and frame size. This is an awesome dataset, the next step is to try out the 1024 pixels/degree data.

The animation:
http://www.youtube.com/watch?v=55PX9zFd020
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joertexas
post Mar 15 2011, 12:13 AM
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QUOTE (Jim Mosher @ Mar 14 2011, 11:51 AM) *
With a little patience you should be able to manipulate the sub-observer and sub-solar points to generate views from different directions or with different lighting. It is also possible to use the scripting capability to generate a sequence of views which can be assembled into an animation or fly-over (either in lighting or position, or both).

Hope this helps.


I had no idea LTVT could display the DEM images. Thanks so much for pointing this out to me smile.gif

JR
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ValterVB
post Mar 28 2011, 08:22 PM
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QUOTE
It'd be great also to know how this community is using the LOLA data, so please reply if you do:
1- Experimental Data Records (EDR) [raw telemetry]
2 - Reduced Data Records (RDR) [altimetric profiles]
3 - IMG Gridded Data Records (GDR) [maps]
4 - JP2 Gridded Data Records (GDR) [maps]
5 - Celestia Virtual Textures


I'm using 3.
A little video with Ldem 64 Video (magnified x 4)
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