I use a system called Socet Set GXP. It's pretty basic photogrametry, but if you want to read more about the tool, click the link:
http://www.socetgxp.com/docs/educati...ogrammetry.pdf
The system will work on everything from overhead Target photos to hand held images.
Yes, these days I pick out where weapons impact...when I was active, I guided them from the ground. It's not just a fun job, it the most fun you can have with your clothes on.