A Surface from 2D SHP Contours
Mark Schnesk of Seiler Design Solutions shows how to utilize a Map 3D tools and an Alter Properties Query to create a Civil 3D Surface from an imported SHP file with 2D Contours.
From the Seiler Design Solutions YouTube Channel.
and the Seiler Design Solutions blog.
A classic and common GIS Data download problem and a clean solution explained well in under ten minutes. Kudos.
If you need the inverse - Build a SHP from a Civil 3D surface,
See the Surface Contour Extraction to SHP video post.