Tin files are mainly used

1. Calculate the elevation, slope, and slope of any point on the surface

2. Generate contour lines using linear or Polynomial Interpolation triangles

3. determine the range of the surface elevation Value

4. Summarize the statistical parameters of the surface, such as the average slope, area, and perimeter relative to the volume of the reference plane.

5. Produce a longitudinal profile along the surface section line

6. Calculate the earthwork volume of the road project, and determine that the earthwork volume dug in one place is equal to the volume filled in another place.

7. Analyze which areas on the surface are visible from a certain point

Transferred from: Http://www.cnblogs.com/magiclamp/archive/2008/09/30/1302512.html