Typically the handheld data collector to do all your calculations, staking, cut and fills, closures, etc. Instead, we've put everything you need on one handheld data collector, the CG-FieldPlus and CG-Robotics, allowing you to seamlessly move back and forth between conventional data collection and using the robotic total station. We've also selected the best handheld data collectors available, The Carlson Explorer and Juniper Allegro. These units are made for surveyors — rugged, durable, easy to use.