In the traditional engineering surveying solution, Optical instruments still plays an important role . GeoRTK offers a complete hardware and software system for engineering applications built on the industry-leading optical instruments such as Total Stations , Theodolites ,Auto Levels ,Rotary Lasers and field software you are familiar with. In the traditional engineering surveying solution, Optical instruments still plays an important role . GeoRTK offers a complete hardware and software system for engineering applications built on the industry-leading optical instruments such as Total Stations , Theodolites ,Auto Levels ,Rotary Lasers and field software you are familiar with.