A Texas drone consultancy provided new, updated orthophoto mosaic, digital elevation model, and 3D topographic map of Enchanted Rock State Natural Area to be used for education, planning, search and rescue, field research and more. They used Arrow Gold for Ground Control Points (GCPs), DJI drones for the aerial survey, GPS Tracker for GCP planning and Correlator3D for processing. Here's their story and results.
UAVs and GNSS: Using High-Accuracy GNSS to Set Ground Control Points (GCPs) for UAVs Inexpensive unmanned aerial vehicles (UAVs) can collect a tremendous amount of valuable imagery that can be used to produce high-precision orthophotos resulting in 2 cm (or even less) pixel resolution. UAVs and GNSS receivers are amazing tools that complement each other.
Unmanned air vehicles can collect tremendous data and imagery to produce high-precision orthophotos. But how can you set up your own GCPs to ensure precision and accuracy? This article from the Eos June 2017 issue explains how.