Hi all-
I'm a long time lurker here and at other forums and rarely post. I'm a professional archaeologist and GIS specialist here in Arizona and thought i could contribute a couple things here. I'm also a prospector, treasure hunter, LDM hunter, etc. etc. First, I've seen the stones and based on my experience portions of them appear to be authentic with actual patina from being buried. However, it should be noted that this can be faked, though I kind of doubt the folks who found them would know how to do that. It's pretty tough to fool people who look at ancient crap all day long every day of their lives. Portions of them appear to have been added, and have no patina. The jury is still out and always will be, but I'm thinking there is something to them.
Second, there is no way any of the numbers on the stone maps refer to Lat/Long coordinates. Granted, Lat/Long has been around for a couple thousand years but the current standard (AKA Google Earth, topos, everything else) wasn't established until the 1880's- well after the time of the Spanish. So, if they do match lat/long somebody is going to have to refer to the lat/long the Spanish were using in the 17 and early 1800's (NOT the current coordinates)- and that is one hell of a task and may even be impossible.
Third, using aerials is kind of ridiculous too since, well, the Spanish didn't have planes/balloons/helicopters/hover craft/hang gliders/jet packs and probably not even flying saucers. Some of the best early maps known were done by the American GLO, and they even got it wrong sometimes. Certainly, if these are indeed stone maps leading somewhere in the Supes, they are only meant as a general guide and are not going to be exact, and they sure as hell aren't going to exactly match an aerial. I'm in the camp that believes they are probably fairly good maps, but you need a little more information to figure out what you are looking for and where it actually is. That being said, these maps may actually be just that- maps. Think about it- what are 99.99% of all the maps ever created used for? Finding your way around- they don't lead to treasure and as Indiana Jones says "X never marks the spot".
Cornelius