A Surface is a model of a physical surface like the original
ground at a site, a borrow pit or a road. It starts with TOPO
points who's elevations are on the physical surface. From these,
TPC generates a TIN (Triangulated Irregular Network) which is a
series of contiguous triangles that represent (model) the
physical surface. These triangles are sometimes called '3D
Faces' or 'Polygon Meshes'. A survey can include any number of
surfaces just like it can have any number of traverses or
drawings. Surfaces can be added, deleted, duplicated, edited and
displayed in drawings using Surface Settings. Having multiple
surfaces opens the door to work with existing vs proposed
surfaces, volumes between surfaces, cut/fill reports between
surfaces and much more. Here are some examples of how you might
use multiple surfaces. See Multiple Surfaces. Example: If you
are surveying stockpiles of crushed rock, you can have a surface
for the 1" minus pile and another surface for the 3" minus pile.
Each surface can compute the vol