Set Active Surfaces
This command assigns which surfaces to use for initial and final.
These surfaces are used by all the Takeoff routine that compare
surfaces including:
- Calculate Total Volumes
- Calculate Volumes Inside Perimeter
- 3D Drive Simulation
- Cut/Fill Contours/Labels/Color Map
- Surface Inspector
- Quick Profile
- etc.
The surface created by the Make Existing Ground Surface command is
called "Existing" and is the default for the Initial Surface. The
surface created by the Make Design Surface command is called
"Design" and is the default for the Final Surface.
The purpose of
this routine to for selecting user-defined surfaces to use in place
of the existing ground or the design surface. For example, there
could be a user-defined surface for alluvial soil that is set as
the initial surface while design is set to the final surface. Then
the calculate volume routines will report the quantities between
alluvial soil and design. Also the Display->Cut/Fill Color Map
routine will make the map for the difference between the alluvial
soil and design surfaces.
These user-defined surfaces can be created using the Add Target
function in the Define Layer Target/Material/Subgrade command
combined with the Make User-Defined Surface command.
Prerequisite: a surface model
Keyboard Command: set_active_tins