Carlson Productivity Tools (sometimes called Protools for short) is the surface calculation service that uses all of the database rover positions to play back those rover movements (updates) over a Carlson Grid file to create an up-to-date as-built surface.
Volume Calculations
Productivity Tools calculates volumes by using the stored position data. The position of the GPS antenna is sent from Carlson Grade to the database on intervals based on a series of conditions.