gis product made after proccesing aerial pictures. excavation site with steep rock walls that was mapped from a drone

gis quarry aerial drone survey map steep wall cartography excavation pit digital elevation model usa united states excavate construction dem engineer development drone elevation excavation dtm engineering excavator geodesy geology graphic gsd hole hypsometric industrial industry inspection investigation land maps ortho rectification rectified topography terrain photogrammetry professional rock site surveying technology topographic transportation