Hi Dean,
I am using Pro 3.1. I am working on an archaeological site that has earthworks (a causewayed enclosure, which is essentially a connected group of ditches and banks). I am attempting to calculate the volume of the earth moved in order to create it. Given the size and age of the site, it is impossible to excavate the entire area, but I have a vector of the site created from aerial photography, and I have the slope of a part of two of the ditches. I also have a DTM of the area as of now, which does not include the banks. I was hoping to extrapolate the point data to the other unexcavated ditches, add them to the DTM, and then use the fill sink tool to to find the volume of these spaces. I apologize for the late answer, but let me know if you need any more info!
Cheers,
Alice