Here I measured all 3 markers of the big 2x3m QR-Code plane. Not a perfect solution, but very well in the sub-centimeters accuracy.
(Only the marker in the middle (top left of the QR-Code) is our normal reference point. I have measured the other mostly for fun/testing)
Server run by the main developers of the project It is not focused on any particular niche interest - everyone is welcome as long as you follow our code of conduct!