Exercise 1: Swapping Tin Edges - Autodesk CIVIL3D - CIVILDESIGNCOMP 2007 SLM CD Tutorials Manual

Surface Smoothing
Surface smoothing is an operation that adds points at system-determined
elevations using Natural Neighbor Interpolation(NNI) or Kriging methods.
The result is smoothed contours, with no overlap.
You perform smoothing as an edit operation on a surface. You can specify
smoothing properties and then turn them on or off. When the smoothing is
turned off, the surface reverts back to its original state. However, the smoothing
operation remains in the surface operation list, and it can be turned on again.
NNI is a method used to estimate the elevation (Z) of an arbitrary point (P)
from a set of points with known elevations.
This method uses information in the triangulation of the known points to
compute a weighted average of the elevations of the natural neighbors of a
point.
To use NNI, specify only the output locations of the interpolated points. The
elevations of the interpolated points are always based on the weighted average
of the elevations of the existing neighboring points. NNI interpolates only
within the surface.

Exercise 1: Swapping TIN Edges

In this exercise, you will swap several TIN edges in a surface.
For more information, see the AutoCAD Civil 3D Help topic Swapping Edges.
88 | Chapter 5 Surfaces Tutorials