Make Road and Site our of Suvey points

How can I make coutour and road by the points given by in survey plans Which is given by me survey person, in cad format. Please help. Thank you

Maybe this command is suitable - The PointCloudContour command creates a series of planar curves by intersecting planes with points or pointcloud objects.

Rhinoceros Help - PointCloudSection | Rhino 3-D modeling (