Differential Global Positioning System (DGPS) is an enhancement to Global Positioning System that provides improved location accuracy, from the 15-meter nominal GPS accuracy to about 10 cm in case of the best implementations.
Drone surveying has risen in popularity on earthworks sites over the past several years. With its ease of use, reliable accuracy, and positive effect on worker safety, many contractors are making the shift from traditional base and rover to drone surveying.
Total stations are the primary survey instrument used in mining surveying. A total station is used to record the absolute location of the tunnel walls, ceilings (backs), and floors as the drifts of an underground mine are driven.
