Mapping Flight at Groundwater Remediation Site

A mapping flight was conducted at a ground water remediation site to complement a land surveyor’s GNSS elevation measurements of 16 monitoring wells at the site. (The surveyor’s equipment comprised a Trimble R10 and data logger, with corrections provided from a nearby CORS station).  The project area was within Gainesville Airport (GNV) airspace.  Hence, authorization was obtained via the FAA's Low Altitude Authorization and Notification Capability (LAANC) to perform the flight. The flight was configured with the Pix4D Capture app and performed at an altitude of 150 ft above ground level.   The drone captured 55 nadir photos at the 3-acre site which were processed by ArcGIS Pro to render a high-resolution orthomosaic and digital surface model (DSM).  Photo processing yielded excellent resolution with a Ground Sample Distance (GSD) less than half-inch.  Below is a graphic of the drone flight line and photo locations along with the resulting DSM, followed by an animation of the rendered 3D textured-mesh model of the site.