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Unmanned Spaceflight.com _ LRO & LCROSS _ LOLA PDS release #5

Posted by: zeBeamer Feb 25 2011, 06:50 PM

Hi All,

Some LOLA products for the PDS release (#5), which will be officially out on March 15, 2011, are now available on the LOLA PDS node !
Label files and documentation are still being worked out, but I thought it'd be good to post (and some of you know we usually put those products online a bit early)

The data released are from July 13, 2009 to January 31, 2011.
There are EDRs/RDRs (individual profiles) for the courageous ones. But most of you will prefer the map products ( http://imbrium.mit.edu/DATA/LOLA_GDR/ ).
In addition to IMG products (int16), there are JP2 files (GeoJPEG2000) which are compressed (lossless) and contain projection information. If you use a GIS programs, that should be helpful. The attached XML files contain the statistics already, which could save you 10+ minutes for the bigger grids upon loading. (Due to PDS filenaming conventions, you need to rename them to file.JP2.aux.xml for that to work properly; tested on ArcGIS).
And keep in mind that in both those formats, the data were digitized at a 0.5m granularity, so you will need to divide the values by 2 to get the actual heights (in meters).

Also of interest for visualization are the updated LOLA texture packages for Celestia.
ZIP files here: http://imbrium.mit.edu/EXTRAS/CELESTIA/
and a few screenshots:







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


Enjoy !!

Erwan

EDIT 2011.02.25 08:30pm EST
I realized there was a mistake in the level 0 normal map. (The files were the same as the topography texture...)
The ZIP files have been updated. In case you downloaded the "old" version, you can download the two level 0 files http://imbrium.mit.edu/EXTRAS/CELESTIA/tmp instead of re-downloading the ZIP.

Posted by: Phil Stooke Feb 25 2011, 07:19 PM

Very nice! At the bottom of the Celestia page you have the non-tiled false-color topography images. Could b/w shaded relief versions be added to that?

(EDIT - actually what Doug asks for works for me as well)

Phil

Posted by: djellison Feb 25 2011, 07:24 PM

QUOTE (Phil Stooke @ Feb 25 2011, 11:19 AM) *
Could b/w shaded relief versions be added to that?


And simple unshaded greyscale 16 bit images (png/tif or similar?)

Posted by: zeBeamer Feb 25 2011, 08:37 PM


QUOTE (Phil Stooke @ Feb 25 2011, 03:19 PM) *
Could b/w shaded relief versions be added to that?

I added shaded-relief images from 4 different lighting azimuths.

QUOTE (djellison @ Feb 25 2011, 03:24 PM) *
And simple unshaded greyscale 16 bit images (png/tif or similar?)

That's very close to the raw IMG files, no? I added grayscale images (PNG, JPG).


Erwan


Posted by: Phil Stooke Feb 25 2011, 09:50 PM

Many thanks for those!

Phil

Posted by: JohnVV Mar 1 2011, 06:40 AM

i am checking them for addition to the celestia motherload as i type
http://celestiamotherlode.net/

in a few days they will also be there

Posted by: mhoward Mar 1 2011, 03:13 PM

QUOTE (zeBeamer @ Feb 25 2011, 12:50 PM) *
It'd be great also to know how this community is using the LOLA data, so please reply if you do:


Thanks for those, Erwan. I use the RDRs to generate my own surface normal map (see http://www.unmannedspaceflight.com/index.php?showtopic=6646&view=findpost&p=169825). I'm looking into upgrading my network connection, as currently it takes me about a week to download each update!

Posted by: Mars3D Mar 8 2011, 10:46 AM

Thank you for releasing this early Erwan.

I am using the rdrs to produce datasets, maps and animations.

Here is an animation using the LOLA PDS release #5 data.
http://www.youtube.com/watch?v=h2GgbcRL0nA

Posted by: charborob Mar 8 2011, 04:40 PM

Great animation! Keep them coming.
Did you notice the pinnacle-like feature in the lower right corner at the beginning of the animation? (see image capture below) Is that real or a processing artifact?


Posted by: Mars3D Mar 8 2011, 04:57 PM

Its almost certainly bad data. I automatically filter some of the bad data out but it doesn't catch everything.

Posted by: joertexas Mar 10 2011, 05:03 AM

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How are you creating the 3D flybys?

JR

Posted by: Mars3D Mar 10 2011, 07:54 PM

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I 'm using the same rendering software I wrote for visualising the Mars HiRISE data.

Posted by: joertexas Mar 10 2011, 11:39 PM

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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

Posted by: JohnVV Mar 11 2011, 02:10 AM

any dem viewer will work
the lola file is in 16bit singed format
the lbl has a off set to use that sets 0.5 Meters increments and in radii in Meters

even the old "3DEM" will work

check out
Virtual Terrain Project
http://vterrain.org/
http://vterrain.org/Packages/NonCom/

there is also "Integrated Data Viewer " a java application
http://www.unidata.ucar.edu/software/idv/
http://www.unidata.ucar.edu/software/idv/docs/userguide/examples/3DSurface.html

Posted by: joertexas Mar 11 2011, 02:37 AM

I've tried many of the standalone programs, but I don't know enough about how to manipulate the data to produce images. I'll try the Java program, though.

When I select the LOLA file, I get this error:

Reading DEM: D:\My Documents\Space Mining Info\LTVT\LTVT_v0_21_3_1_full_version\LDEM_875N_10M.IMG
Data object "D:\My Documents\Space Mining Info\LTVT\LTVT_v0_21_3_1_full_version\LDEM_875N_10M.IMG"
not compatible with "dem" data family



JR

Posted by: Mars3D Mar 11 2011, 09:58 PM

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.

http://www.mars3d.com/NP3Shaded.jpg a map of the area you mentioned.

http://www.mars3d.com/NP2Shaded.jpg another map of the north pole showing a larger area (with exagerated lighting)

Posted by: JohnVV Mar 11 2011, 10:09 PM

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 )

Posted by: joertexas 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

Posted by: joertexas Mar 11 2011, 11:08 PM

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

http://www.mars3d.com/NP3Shaded.jpg a map of the area you mentioned.

http://www.mars3d.com/NP2Shaded.jpg 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

Posted by: Mars3D 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.

Posted by: joertexas Mar 12 2011, 10:45 PM

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

Posted by: Jim Mosher Mar 14 2011, 04:51 PM

JR,

You indicated earlier that you had already studied the LOLA DEM data with the http://ltvt.wikispaces.com/Digital+Topography, 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 http://the-moon.wikispaces.com/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 http://ltvt.wikispaces.com/Sources+of+Planetary+DEM+Data#LOLA http://imbrium.mit.edu/DATA/LOLA_GDR/POLAR/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 http://ltvt.wikispaces.com/LTVT+Scripts 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

 

Posted by: Bjorn Jonsson Mar 14 2011, 08:04 PM

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

Posted by: joertexas Mar 15 2011, 12:13 AM

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 http://ltvt.wikispaces.com/LTVT+Scripts 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

Posted by: ValterVB Mar 28 2011, 08:22 PM

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 http://vimeo.com/11281224 (magnified x 4)

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