I am sure we have all seen this specification, +/- 1/4″. The question is what does it really mean? Let’s take a fairly large office building – multiple floors, 100+ rooms, a couple of acre footprint and the laser scanning spec is – you guessed it, +/-1/4″.
Does this mean absolute accuracy, or relative precision? Is there any survey control/ laser scanner combination on the market today that can meet that requirement, at a reasonable cost, or any cost for that matter?
But should that really be the question, or should we be thinking more in terms of the way in which the dimensional information is intended to be used. Isn’t the use of laser scanning better than manual point by point survey methods?
These are just some of the questions that I think need to be answered. What do you think?