In photogrammetry and aerial mapping, are physical markers placed on the ground with known precise coordinates. Ground control points: why are they important? - Pix4D
: It is one of the most vital safety aspects, as roof, rib, and face falls were responsible for nearly 40% of all underground fatalities between 1999 and 2008. Key Techniques : Ground Control
: Installing rock bolts (1.5–2.4 m) and cable bolts (4–12 m) to pin large blocks of rock together. In photogrammetry and aerial mapping, are physical markers