I never noticed them earlier.
I do see they are using a "Total Station". I have no fucking idea why. http://www.trimble.com/survey/Total-Stations.aspx
Looks like a complete waste of time to measure from the fucking door to the damn sidewalk. I don't see any need to map the elevation of the different sidewalk cracks either.
I see five guys, minimum, that are having a fairly easy day playing with toys.