I have tried Pix4D for volume measurements. And it works great.
But I like to understand how many “measuring points” I get per square meter with a given GSD.
Lets say that the GSD is 4cm.
I think this is the answer:
100/4=25 (100cm/GSD=measuring points per meter)
25x25=625 (measuring points per meter x measuring points per meter = measuring points per m2)
With a GSD of 4 cm I would get 625 measuring points per m2 when I do a volume calculation. Correct?