There is nothing about GPS precision.
But it is interesting to watch.
And, I …
and, hope …
and, he …
and, did …
and, not …
and, forget …
and, to remove …
and, the plastic …
and, wrap …
and, from …
and, the lens …
and, before …
and, filming. 
Nevertheless, a pretty useful and exhaustive dashcam comparison! 
However, only three dashcams come with GPS. The VIOFO offers amazing bang per buck performance and fortunately also has GPS. It basically plays in a league of its own. If I were looking for a dashcam there would not be much need for looking any further.