There are many similar questions like this. But I haven't found a usefull answer yet. So I hope some of you have a suggestion to this.
I've done some flyovers with the drone at a contruction area, and then got a DSM out of these, using Pix4D. Now I have 2 different DSM, and then imported these into QGIS. Through rastercalculator i've withdrawn these from each other to get the height difference. See below:
I then would like to find out the volume of where there have been a height difference.. So some of the area I have marked red (increased volume) and the blue (decrease in volume). Also using rastercalculator and polygonize. See below.
Is there a smart way to find the volume of the blue and red marks of these rasterlayers in QGIS, or do any of you have an alternative program that would do the job easier and faster?