I can’t speak to the *techniques* that those creators of those humanly-made designs used, along with their GPS devices (I would think of line-of-sight, physical distance measurements and compass points to supplement and make more accurate).
However, the big problem would be to make it precise, and also to do so in a minimal amount of time. I can get GPS to be very precise, just by itself, but it takes money, specialized and expensive equipment and a lot of time. For all I know, they did so over days and days, and took their time to get it all right, which would be something (with that sort of methodology) which could be done. And if I were to do that and do it right and very precise, I would use every technique I could come up with and take plenty of time and *get it right*. And with that, I could probably make an exquisite crop circle.
But, to really speak to it, I would have to see what their technique was. That would be a key and critical thing to evaluate. I can only guess about it as we speak, right now.
However, the one thing that I don’t have to guess about, since it’s *so well documented* is the error that is inherent in GPS devices. There’s no question about that.
And furthermore, when talking about crop circles (even with one removing the time constraint issue), one still has to deal with the other measurable parameters that have not been demonstrated by those other humanly-made designs. No one has been able to reproduce those. So, I haven’t see any way for that to be done.
I don’t recall the details well at all . . .
In addition to boards and ropes . . . which damage the crops
ENTIRELY DIFFERENTLY
than occurs in the authentic crop circles
. . . a fact the naysayers seem to consistently ignore . . .
they reportedly use drafting paper—the kind with squares on it etc. and I think also, tape measures.
No way such methods are going to produce the larger formations in an hour.