The World's First Automatic 3-Dimensional GPS Grade Control System.

Only Topcon provides a 3D grade control system featuring GPS+ technology to make stakeless grading more productive than ever. Topcon's 3D-GPS+ system has the ability to track both GPS and GLONASS satellites to ensure you won't have equipment downtime from too few satellites, a problem found in ordinary GPS-only systems.

3D-GPS features include:

• Fully Automatic control
• GPS+ technology for increased productivity
• Multiple machine capability
• Seamless addition to System Five control
• World's easiest-to-use operator interface - the System Five 3D control box

Only Topcon has it!

How does it work?

Getting started with 3D-GPS is easy. The 3D-GPS base station can be set up daily on a tripod over a known point, or set up on a permanent point such as the top of a jobsite trailer or telephone pole. It remains in the same location for the duration of the job, unlike lasers that have to be repositioned as the job progresses. Because it never needs to be moved from its initial location, the errors associated with base station setup are minimized. The base station is always available to send precision position corrections to the machine with 3D-GPS. And, outfitting the machine with its appropriate components is easy. Before you know it, you're working with automatic GPS control!

Satellites send positioning data to the GPS antenna/receiver combination at the base station and to the GPS antenna/receiver combination on the machine. The base station is set over a stationary point so it can very accurately calculate its position. The receiver on the moving machine moving is able to determine an approximate position. To grade to tighter tolerances, the base station sends signal corrections to the machine via a radio. These corrections help the machine determine its exact location on the site. At the machine, the data is processed by Topcon's 3D-GPS Software to accurately provide the System Five 3D control box the real-time position of the machine in three dimensions. This positioning data is updated ten times per second and, with the engineers' digital site plans, controls the blade of the machine for elevation and slope automatically!

Why upgrade?
3D-GPS+ is not only accurate to plus or minus one tenth of a foot, but it's also an incredible time saver! Because it uses System Five's valve control, it's fully automatic without installing extra components. There's virtually no staking or re-staking required because 3D-GPS+ works right from site plans and satellite positioning data. And unlike laser control, 3D-GPS+ allows the use of multiple machines even on hills, with just a single base station. Plus, you're free to move thousands of feet from the base station and still receive grade corrections via the radio.
No headaches! Just fast, automatic grade control!