Strange Symbol - Alaskan Lake discussion
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Strange Symbol - Alaskan Lake
Strange Red & Black Symbol in an Alaskan forest. Strange overlap of map segments as well.
These are called fiducial marks, and are (in some older processes) used as part of the orthorectification process to warp the image onto the surface of the earth. This and the poor overlap are signs of sloppy work.
Originally Posted by Jason Birch
Thank you. It seems you learn something everyday.
You can see them as well here:
just have a closer look to the cutting edge
looks alot like half of somekind of targeting for a fighter jet
I was going to make a remark about headshots, but they are indeed meant to get the map texture on the earth frame
I agree with Jason Birch.
In the attachment you can see a part of the edge of a 50 MB satellite image with a similar fiducial mark.