You can extract AutoCAD primitive entities from an AutoCAD Civil 3D surface.
Extracting individual components from a surface enables you to manipulate these components without exploding the surface object. The surface data available to extract is based on the display properties of the selected surface.
|Surface component ...||Is extracted as ...|
|Points (2D and 3D)||Point objects|
|Triangles (2D and 3D)||3D face objects|
|Major Contour (2D and 3D)||LWPOLYLINE object|
|Minor Contour (2D and 3D)||LWPOLYLINE object|
|User Contours (2D and 3D)||LWPOLYLINE object|
|Gridded (2D and 3D)||
|Directions (2D and 3D)||The type of object depends on the surface style settings. See.|
|Elevations (2D and 3D)|
|Slopes (2D and 3D)|
|Slope Arrows (2D and 3D)|
|Watersheds (2D and 3D)|