I collected imagery with a Mavic Pro of a forested area. I used Pix4D capture to collect imagery. Flying height: 50m. Overlap: 80%. Camera angle between oblique and nadir. Supposed GSD: 1.7 cm. My goal for the imagery had been to estimate the volume of the forested area either directly with pix4D or differencing the height of the trees with a lidar DEM for the same area. There is non-forested terrain around the forested patch.
The forest shows up in the ortho generated in Pix4D but when I go to the “volume” view the forested area is a point-less, black void. Any ideas on if this is because of processing within pix4d or an imagery issue?
My only idea at the moment is to re-shoot flying higher and with more overlap, perhaps changing the camera a angle.
Thank you, Sarah