Professor Glob writes -

'Further evidence for this seems to be provided by a hazel stick 30.9 inches long which was found close to the northern side of the coffin and which had notches cut along its side. Measuring from one end, the first and second notches were at intervals of six inches, the third notch being twelve inches from the second and six from the far end. There can be little doubt it was a Bronze Age measuring rod marked out in feet, which was used in the construction of the coffin and possibly also in the the laying out and erection of the mound.' - P.V. Glob (1973) The Mound People - Danish Bronze-Age Man Preserved, published by Gylendahl.

It's odd how separate strands of academia continue separately but I wonder how the bands of surveyor builders communicated with each other. Possibly it was by a form of horn semaphore, possibly by smoke signals.