Sorry to hear you have run into so many problems on your first attempt, you are correct this project should be fairly trivial for the program.
Suitability of CAD Data for Import :
Kubla Cubed imports CAD data using layers (you can copy and paste to if you have a CAD program). The problem I see with the CAD data is that it there are just so many layers with different naming conventions and formatting it is very confusing. For purposes of Volumetric surface comparison it is worth being very clear with the naming (e.g Existing_Conts_MJR etc…)
The existing points seem to be in :
nat_surface_point
The points as you noticed are not contained in ‘point’ entities but ‘blocks’ so you have to set the point importer to detect blocks.
The contour lines I had no problem with apart from finding which elevation information was in which layer. I actually found that there are existing contours in layers :
cont_minor
cont_major
which can be used to improve the definition of existing. The proposed contours where in
C-SURFACE_Contour_Major
I had no problems with any of these, could your problem have related to not turning on\off the layers which contained the relevant data ?. I could find no representation of the proposed “match line” indicated on the site plan, it was in there but in order to be imported into Kubla Cubed as a Ground Level Boundary Outline, the CAD entity would need to be a closed Polyline or a closed 3D polyline and currently it is a number of loosely connected line segments.
