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KNOWN ARTIFACTS
These are known artifacts present in some, but not all, HiRISE DTMs.
They may not be present in this DTM! Look at the terrain shaded relief to detect these before using the DTM!
- Boxes
Some DTMs have square areas that are usually about .5-1 m different in elevation from the surrounding areas.
These are artifacts of the processing algorithms used in Socet Set ((c) BAE Systems).
There may be goups of these boxes. They are almost impossible to edit out, so the user should look
for such artifacts in a terrain shaded relief map before using the DTM for analysis.
- CCD seams
A HiRISE image is made up of 10 individual images, stitched together along their long edges.
In a DTM, these seams can be visible as long lines. These seams are difficult to remove from the whole
- Faceted areas
Areas that were very bland (low contrast) or deeply shadowed with low contrast and low signal may have
a "faceted" look to them. Terrain in these areas is not trustworthy.
Originally posted by ArMaP
I think it looks natural, although interesting, from a geological point of view.
Here is the full resolution image, from the RGB version.
(click the image for the full resolution, 3.3 MB, image)
Originally posted by ArMaP
reply to post by indunedain
I think that, if there's life on Mars, it probably exists underground, inside empty lava tubes, for example, where the temperatures are less extreme and the air is denser, making the possibility of liquid water more likely.
Originally posted by Genus
Notice the smooth patches all around the picture? Some could say it's dust, as Mars is "supposedly" a dry dusty planet. But I know enough about images on computers to spot Smudge applications when I see them. It'd probably be a lot easier to tell what that junk was if we could see what's being hidden around it.