IPB

Welcome Guest ( Log In | Register )

 
Reply to this topicStart new topic
Eagle and Endurance DEM's available!
djellison
post May 17 2006, 09:30 AM
Post #1


Administrator
****

Group: Chairman
Posts: 13799
Joined: 8-February 04
Member No.: 1



http://anserver1.eprsl.wustl.edu/anteam/mera/mer_osu.htm

Two things..

1. Phil - YAY - bundle adjusted references for all the sites in the top two txt files!!!

And 2. Um....what does one do with those Bin's. Damn I wish I could code...if anyone knows a means to get that lot into any sort of appropriate 3D format they win the UMSF 'special cookie' award smile.gif

Just for fun - I bunged the XY data of MERB into Excel. It's not 'square' i.e. it's not accurate - but I think I'll go for something accurate in Photoshop smile.gif

Also - Z axis against Sol for Spirit...I've seen that graph somewhere else...but making it ones self from data is always much more fun - you can clearly see Bonneville, Missoula, West Spur and the return to Larrys Lookout.

Doug
Attached thumbnail(s)
Attached Image
Attached Image
 
Go to the top of the page
 
+Quote Post
helvick
post May 17 2006, 04:35 PM
Post #2


Dublin Correspondent
****

Group: Admin
Posts: 1797
Joined: 28-March 05
From: Celbridge, Ireland
Member No.: 220



QUOTE (djellison @ May 17 2006, 10:30 AM) *
And 2. Um....what does one do with those Bin's. Damn I wish I could code...if anyone knows a means to get that lot into any sort of appropriate 3D format they win the UMSF 'special cookie' award smile.gif

Well the .bin's are dead handy for converting directly to a graphical bump map, creating shaded relief maps and so on, I'm certainly going to have a bash at the latter later. Converting to a mesh requires some processing though and that's outside of my area of expertise at the moment.
Go to the top of the page
 
+Quote Post
djellison
post May 17 2006, 05:16 PM
Post #3


Administrator
****

Group: Chairman
Posts: 13799
Joined: 8-February 04
Member No.: 1



I've begun to make some progress - it's getting quite interesting smile.gif Some piccies of Endurance later perhaps biggrin.gif

Doug
Go to the top of the page
 
+Quote Post
helvick
post May 17 2006, 07:52 PM
Post #4


Dublin Correspondent
****

Group: Admin
Posts: 1797
Joined: 28-March 05
From: Celbridge, Ireland
Member No.: 220



QUOTE (djellison @ May 17 2006, 06:16 PM) *
I've begun to make some progress - it's getting quite interesting smile.gif Some piccies of Endurance later perhaps biggrin.gif

There's some oddness in the labelling of the files - the Eagle bin file is labelled as 68Mb but is 29,160,000 bytes (2700x2700x4bytes per data point), the endurance bin is labelled as 28Mb but is actually 1312416 bytes (588x558x4).
Quick and dirty first pass at the Eagle bin file - converting to png. Apologies for the garish colour scheme but its a quick and dirty linear colour ramp just to see if the data all works.
Attached Image

I'm having some problems with the endurance bin - I'm not getting anything sensible out of it yet.
Go to the top of the page
 
+Quote Post
helvick
post May 17 2006, 08:03 PM
Post #5


Dublin Correspondent
****

Group: Admin
Posts: 1797
Joined: 28-March 05
From: Celbridge, Ireland
Member No.: 220



QUOTE (helvick @ May 17 2006, 08:52 PM) *
I'm having some problems with the endurance bin - I'm not getting anything sensible out of it yet.

Just noticed that the eagle bin is big-endian (Motorola FP32) and the endurance one is little-endian (Intel FP32). Odd thing is that the eagle one works on my Intel machine and not the endurance one. Hmmh.
Go to the top of the page
 
+Quote Post
helvick
post May 17 2006, 09:00 PM
Post #6


Dublin Correspondent
****

Group: Admin
Posts: 1797
Joined: 28-March 05
From: Celbridge, Ireland
Member No.: 220



Something definitely odd - the file labelled Motorola FP32 (Eagle) is actually littlendian and the Intel FP32 (Enfurance) is bigendian. Maybe it was just a test. Anyway as "grayscale" images - got to work out how to output the data with better depth resolution (these are true color pngs just using gray values so there's really only 8 bits of depth) which is about 1cm for Eagle and 10cm for Endurance. The data for Endurance isn't quite square but the error is only about 0.07% so it amounts to less than half a pixel over the full image so it's not noticable.
Endurance:
Attached Image

Eagle:
Attached Image
Go to the top of the page
 
+Quote Post
djellison
post May 17 2006, 10:46 PM
Post #7


Administrator
****

Group: Chairman
Posts: 13799
Joined: 8-February 04
Member No.: 1



Obviously there are artifacts in the Endurance DEM - so I've used a mesh density half that of the actual DEM to help cull some of that - after all there is a disclaimer on the page saying that once they get a chance to sit down and catch their breath they'll get these tidied up etc. Who knows...we might end up with one of the Southern Basin, or Victoria Crater smile.gif

I think probably the most appropriate 'res' for something like this lies between the two densities...something like 1 million points is essentially 'plenty' smile.gif

Doug
Attached thumbnail(s)
Attached Image
 
Go to the top of the page
 
+Quote Post
helvick
post May 17 2006, 11:01 PM
Post #8


Dublin Correspondent
****

Group: Admin
Posts: 1797
Joined: 28-March 05
From: Celbridge, Ireland
Member No.: 220



QUOTE (djellison @ May 17 2006, 11:46 PM) *
I think probably the most appropriate 'res' for something like this lies between the two densities...something like 1 million points is essentially 'plenty' smile.gif

I've run into a wall with trying to push the data out in a decent 16bit grayscale format using the quick and dirty approach. I'll try again tomorrow with something a bit more capable than Perl::GD. I'm still a bit confused about the big endian \ little endian thing though doesn't make much sense.
Go to the top of the page
 
+Quote Post
CosmicRocker
post May 18 2006, 04:19 AM
Post #9


Senior Member
****

Group: Members
Posts: 2223
Joined: 1-December 04
From: Marble Falls, Texas, USA
Member No.: 116



Nice work with that last one, Doug. I need to refresh my skills with this grid plotting software, as I didn't create anything as pretty as your view. I'm working with the ASCII files, since they are easily accepted by my software. I can see that there is quite a bit of detail in the data; now to learn to bring it out as you have. I tried a shaded relief map of Endurance, but it was difficult to make it look well, and it appears to have a strange network of artifacts. I wonder if that is some of what they hope to eventually clean up.

I found it curious that the ASCII file for Eagle was huge...60+ MB, while that for Endurance was relatively small.
Attached thumbnail(s)
Attached Image

Attached Image
 


--------------------
...Tom
Go to the top of the page
 
+Quote Post
djellison
post May 18 2006, 07:00 AM
Post #10


Administrator
****

Group: Chairman
Posts: 13799
Joined: 8-February 04
Member No.: 1



I used the Ascii files with Surfer, but then 3dem with the bin files to generate a Terragen mesh from which I made a Tif which I used as a displacement map smile.gif

There's what, 250k points on the End one, 7.29 million in the Eag one - so it's 30 times more data than the End one...not suprising it's a bit big.

I wondering if perhaps, just perhaps this little easter egg of data is in response to the email I sent to Prof Li a few months ago asking if he could do elev maps for us nutters smile.gif

Attached - the dem at the best res I've got it into 3ds, and the res I actually use it at smile.gif
Doug
Attached thumbnail(s)
Attached Image
Attached Image
 
Go to the top of the page
 
+Quote Post
djellison
post May 18 2006, 10:21 AM
Post #11


Administrator
****

Group: Chairman
Posts: 13799
Joined: 8-February 04
Member No.: 1



6.6 Megish...
http://www.unmannedspaceflight.com/doug_im...nd_dem_phil.wmv

Not happy with the compression though - I'll try a H264 Mov at 720p and half 720p later smile.gif

Doug
Go to the top of the page
 
+Quote Post
Pertinax
post May 18 2006, 01:11 PM
Post #12


Member
***

Group: Members
Posts: 196
Joined: 2-March 05
From: Richmond, VA USA
Member No.: 181



Beautifull work -- particularly nice with the overlay.


-- Pertinax
Go to the top of the page
 
+Quote Post
Phil Stooke
post May 18 2006, 01:22 PM
Post #13


Senior Member
****

Group: Members
Posts: 5726
Joined: 5-April 05
From: Canada
Member No.: 227



Very nice maps. The artifacts in the Endurance map must be caused by the interpolation routine they use to grid the data.

Phil


--------------------
... because the Solar System ain't gonna map itself.
Go to the top of the page
 
+Quote Post
aldo12xu
post May 18 2006, 04:03 PM
Post #14


Member
***

Group: Members
Posts: 320
Joined: 19-June 04
Member No.: 85



Great piece of work, Doug. In the video, it really becomes clear that the rocks from Escher to Wopmay are part of a slump feature. And it's possible to follow the contact between the Upper and Middle Units of the Burns Formation. Really cool!


--------------------
Go to the top of the page
 
+Quote Post
algorimancer
post Jun 24 2006, 01:14 AM
Post #15


Member
***

Group: Members
Posts: 587
Joined: 20-April 05
From: League City, Texas
Member No.: 285



QUOTE (djellison @ May 18 2006, 05:21 AM) *
6.6 Megish...
http://www.unmannedspaceflight.com/doug_im...nd_dem_phil.wmv

Not happy with the compression though - I'll try a H264 Mov at 720p and half 720p later smile.gif

Doug

Very nice. Funny, the bowl of the crater has much shallower slopes than I'd anticipated... my perception had been that the rim was pretty steep. Good job of eliminating the artifacts.
Go to the top of the page
 
+Quote Post

Reply to this topicStart new topic

 



RSS Lo-Fi Version Time is now: 21st October 2014 - 12:01 PM
RULES AND GUIDELINES
Please read the Forum Rules and Guidelines before posting.

IMAGE COPYRIGHT
Images posted on UnmannedSpaceflight.com may be copyrighted. Do not reproduce without permission. Read here for further information on space images and copyright.

OPINIONS AND MODERATION
Opinions expressed on UnmannedSpaceflight.com are those of the individual posters and do not necessarily reflect the opinions of UnmannedSpaceflight.com or The Planetary Society. The all-volunteer UnmannedSpaceflight.com moderation team is wholly independent of The Planetary Society. The Planetary Society has no influence over decisions made by the UnmannedSpaceflight.com moderators.
SUPPORT THE FORUM
Unmannedspaceflight.com is a project of the Planetary Society and is funded by donations from visitors and members. Help keep this forum up and running by contributing here.