Graphics Programs Reference
In-Depth Information
ChAPtER 17
Designing New terrain
With the completion of
the pipe networks, the design of the road is
nearly finished. It's now time to move on to the next area of the design:
the shaping of the land, or
grading
, of the adjacent areas. In Chapter 9,
“Designing in 3D Using Corridors,” you designed a 3D model of the road
in the form of a corridor. This model will serve as a basis for much of the
adjacent design that will take place, such as the shaping of individual lots
and grading in the stormwater management area.
Each of these areas has unique design objectives. The individual lots will
be shaped so that homes can be built on them without requiring significant
earthmoving. The stormwater management area will require a pond to serve
as a means of collecting and treating the stormwater runoff. These designs
will serve as opportunities for you to study the two primary grading tools con-
tained in the AutoCAD
®
Civil 3D
®
software: feature lines and grading objects.
In this chapter, you'll learn to
▶
Understand grading
▶
Understand feature lines
▶
Create feature lines
▶
edit feature lines
▶
Understand grading objects
▶
Create grading objects
▶
edit grading objects
understanding Grading
Grading
is the term that is most often used to describe the shaping of the
land as a construction or design activity. From a design perspective, it's usu-
ally considered different than corridor design, which is also a form of terrain
shaping but most often used for long, uniform, linear designs such as roads,
channels, and so on. The term
grading
is typically used to describe shaping
the land in small areas or modeling features that aren't long and uniform.
