I recently completed mapping approximately 16 miles of pipeline corridor. Flights were performed with a Microdrones MD4-1000DG. Images were captured with a Sony RX1R2 Camera. This unit utilized an Applainx IMU/GNSS board, that when post processed should allow for approximately 2cm Horizontal and 5cm Vertical Accuracy and Orientations of images. Post Processing appears to have been smooth with no GNSS/IMU quality issues.
Camera has been calibrated correctly, and 45 GCPs were used for this project.
However, upon processing the corridors in Pix4d, all have failed in its reconstruction. Missions were flown at 80% front lap, and 60% sidelap at 85m AGL.
Anyone have advise on specific settings I should be using for corridors? I have processed 50+ projects in grid based, and smaller corridors, but nothing has been as frustrating as this project. Any help would be appreciated.