Survey points
The surfaces of the project: the ground (the first) and any other – a design surface, the ground after excavation. Import points reads CSV or text with or without a header; check the first points to see that easting and northing are the right way round. From sections places a layer of the sections on the plan.
Longest TIN edge leaves out long triangles across bays and the inside of bends; a boundary keeps the TIN inside an outline or a band along the alignment.
Commands
CXTOPOImport survey points (CSV)…
Import CSV points (Sl, E, N, Z, code) as points with level and code texts.
CXCONTOURTIN and contours…
Triangulate points, level texts or 3D polylines and draw contours with labels.
CXSURFVOLSurface volume…
Cut / fill volume of a surface against a level or a second surface (grid method, optional boundary).
CXTINSECCross sections from survey points…
Sample ground levels from a TIN of survey points at stations and offsets along the alignment.