How should I model a random 3D-geometry using AUTOCAD CIVIL 3D?
I have NEZ data from a total station survey of an uneven region. Importing them to AUTOCAD CIVIL 3D gives me points.
What element should I use to model the 3D geometry enabling me to perform further calculations like volume etc. ?
You will need to construct at least 2 surface models to compute volumes. It seems you need to learn a bit more about the software before attempting to use it. I recommend you at least go through the tutorials on surfaces, gradings and corridors. See the Help pull down to access the tutorials.
Infrastructure Suite/C3D 2013, LDT 2004, Power Civil v8i SS1
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RADEON 6450, 1 GB