This is cross-posted (as in, these are not my words, so let's not get copyright confused here) from
here as some may not bother clicking the link:
These are surveyor symbols... like what you'd use on a map.
And compare:
These are crosshairs:
And a bullseye:
The sort used on the DLC map:
The Freepers were all over this in March. I think a lot of people owe Sarah Palin an apology.