View Full Version : i-cubed Landsat7 now available
If you open World Winds layer manager and navigate to Images->NASA Landsat Imagery, you will see a new layer named I-Cubed (http://www.i3.com/) ESAT World Landsat7 Mosaic, tick it and enjoy.
An Isilon cluster was used by i3 to optimally process the raw Landsat7 data using sophisticated i3 color-balancing algorithms. Isilon systems donated to NASA were again used to rapidly build the i3 donated color-balanced imagery into World Wind's tiling scheme. Much thanks goes to i3 and Isilon for their generosity of donating this imagery into the public domain.
02-21-2007, 04:12 AM
Be forewarned: the server is pretty slow. :)
02-21-2007, 09:09 AM
I've have found a pair of holes in the layer at level5 (exactly over my home in Barcelona, very annoying...) worldwind://goto/world=Earth&lat=41.45505&lon=1.99781&alt=13319
I suppose it's due to processing errors, should we report i3 about it?
02-21-2007, 11:53 AM
No, i3 just processed the data. If their is a "hole" it is a server hickup. Try refreshing your cache for that area. If it still comes up, post in the forum.
02-21-2007, 12:05 PM
I have already tried refreshing the cache, but the trouble is inside the tile, half of it has an image while the other half is a black strip. This is why I thought of a processing error.
02-21-2007, 12:09 PM
post the WW url, will have to check into it then.
02-21-2007, 12:14 PM
It's worldwind://goto/world=Earth&lat=41.45505&lon=1.99781&alt =10
It appears at 10 km altitude
One of the bad tiles is numbered 1870_2588 (level 5)
02-21-2007, 01:00 PM
NASA's server is still having growing pains, particularly with levels 4 and 5.
02-21-2007, 03:06 PM
Another comment about the new layer: in general colors look much better than in the oneearth15m layer (at least more realistic to me), but I have noticed that in mountainous areas the ice is painted in pink/violet, similar to the geocover layers. Maybe it has been done this way in purpose... or?
02-21-2007, 03:37 PM
OnEarth has a pseudo-color layer (one with lots of pink because it includes infrared information also) and a visible color (one made to use only visible colors so it theoretically looks as realistic as possible).
For the OnEarth pseudo-color layer, exposed earth/rock is mostly pink, vegetation is mostly green, water is dark blue, and ice/snow is white. The various pseudo-color layers in WW are very handy for spotting water because water looks blue in those layers no matter what color it really is (brown, tan, green, etc.).
02-21-2007, 05:52 PM
And some comparion bewteen WW Landsat, i3 Landsat and GE
02-22-2007, 09:10 AM
The problem of the "wrong" tiles has disappeared, at least in a different computer it works fine.
I'm suspecting something from my computer was corrupting the images...
The NASA guys are regularly deleting any black tiles from the server when they are found, so it's probably not your computer ;)
The coloring and sharpness of this new mosaic is eye candy. But unfortunateley it has, like NLT Landsat, some misalignment in western germany. At worldwind://goto/world=Earth&lat=52.21941&lon=7.70204&alt=41974&dir=0.3 you can see double images. The tiles between 52° and 51° north and 7° and 8° east seem to be shifted ~5km to the south. You can spot those misalignments when you switch between the i-cubed mosaic and onearth pseude color mosaic (which is perfectly aligned).
02-25-2007, 11:45 PM
I get some scrambled tiles. For example: worldwind://goto/world=Earth&lat=-22.74239&lon=117.45132&alt=77122
I refreshed several times and it downloaded the same.
moe black tiles
03-04-2007, 10:05 PM
I got black tiles from NLT Landsat Pseudo also, so maybe there are server problems.
could be, I'll poke ddh tomorrow if he is online.
03-05-2007, 12:36 AM
Also the funky SRTM tiles. :)
03-05-2007, 07:00 AM
As it has been said, i-cubed imagery is "eye-candy".
I regret some artifacts that make is usable from further from earth than NLT imagery
i-cubed : http://img156.imageshack.us/img156/3874/icubeti3.th.jpg (http://img156.imageshack.us/my.php?image=icubeti3.jpg)
Anyhow, it's a great job!!!!
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