GEOSHACK

CONSTRUCTION LASERS, OPTICAL SURVEYING INSTRUMENTS, GPS AND LASER BASED GRADE CONTROL RECEIVERS THAT INDICATE THE ELEVATION OF THE CUTTING EDGE OF THE BLADE OF A CONSTRUCTION EARTHMOVING MACHINE, PC SOFTWARE FOR QUANTITATIVE TAKEOFF OF EARTHWORK VOLUMES AND DATA MANIPULATION, GPS BASED SURVEYING INSTRUMENTS, HANDHELD LASER BASED DISTANCE MEASURING TOOL FOR MEASURING INTERIOR DIMENSIONS