Graphics Programs Reference
In-Depth Information
Cut area with ditch
Fill area with no ditch
FiGuRE 9.16 Areas of daylighting along the corridor
12. Save and close the drawing.
You can view the results of successfully completing this exercise by opening
Applying Corridor Targets - Complete.dwg .
Creating Corridor Surfaces
In Chapter 4, “Modeling the Existing Terrain Using Surfaces,” you learned
about the benefits of using a surface to model the existing terrain. A surface
provided a model of the land and enabled you to do things like display con-
tours, label elevations, and create surface profiles. Imagine having all those
capabilities with a corridor as well. This is made possible through the creation
of a corridor surface.
Cut and Fill
The terms cut and fill are used quite a bit in relation to land-development
activities. For example, in the BasicSideSlopeCutDitch subassembly, the word
cut refers to a condition where the road is below existing ground and therefore
has to project a slope upward in order to daylight. Another way to envision this
is that earth must be cut away in order to construct the road in these areas. The
opposite of cut is fill , which refers to conditions where an area must be filled
in with earth to create a design feature. Cut and fill can also be used to refer
to quantities of earth, where cut represents the volume of earth that must be
removed to build something and fill represents the volume of earth that must
be brought in to build something.
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