If anyone is interested in seeing how these artifact finding things work, i worked it out in a spreadsheet.  It's not very pretty but it works more or less anywhere.  If anyone actually looks at it, let me know and I'll go back and make it a bit more readable and document a bit of what's going on.  https://docs.google.com/open?id=0B0t7Y- … jc3TmhzWU0

Basically you need 3 scans from fairly different locations.  You plug in your coordinates at each of the scans and the distance your scans resulted and you get a artifact coordinates. 

Keep in mind that the coords given are only approximate.  The way these solutions work is to draw a circle around each of the scan points with a radius equal to the distance reported in the scan.  Depending on how the scans are oriented, the circles don't intersect at a single point but rather, bound a region in the center.  I'm currently pondering how to deduce the error of any particular reading but I'm not quite there yet.  (i'm aware that someone has probably already solved this, but I like solving puzzles.)

Again, here's the link to the spreadsheet https://docs.google.com/open?id=0B0t7Y- … jc3TmhzWU0

p.s.  Also, i doubt the sheet will work in google docs so you'll probably need to download a copy for yourself to play with it.