Graphics Programs Reference
In-Depth Information
5.
Change the style to Major Grids 1V.
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This displays the profile
in its true form, as it
really exists in the
field. Think about
which profile would
be easier to work with:
the exaggerated one,
where the peaks and
valleys are obvious, or
this one, which is true
to scale but much more
difficult to analyze?
FiGuRE 8.3
Additional grid lines displayed as a result of
applying the Major & Minor Grids 10V profile view style
it's oK to Exaggerate Sometimes
Vertical exaggeration is a common practice used to display information in profile
view. In most places, the earth is relatively flat, and changes in elevation are
subtle. To make the peaks and valleys stand out a bit more, the elevations are
exaggerated while the horizontal distances are kept the same. The result is a
profile that appears to have higher high points, lower low points, and steeper
slopes in between. This makes the terrain easier to visualize and analyze. When
this technique is used, you'll likely see a pair of scales assigned to the drawing:
one that represents the horizontal scale and one that represents the vertical
scale. For example, a drawing that has a horizontal scale of 1" = 50' and a vertical
scale of 1" = 5' is employing a vertical exaggeration factor of 10. For a metric
example, a horizontal drawing scale of 1:500 and a vertical drawing scale of 1:50
also achieves a vertical exaggeration of 10.
The following three profile views have a vertical exaggeration of 10, 5, and 1, from
left to right. The same existing ground profile is shown as a red line in all three.
DOT stands for
Department of
Transportation
, which
in the United States is a
common way of refer-
ring to government
regulatory depart-
ments and other agen-
cies that manage roads
and other transporta-
tion infrastructure.
6.
Change the style of the profile view to DOT.
This is an example of how the graphical standards of a client or
review agency can be built into your Civil 3D standard styles, making
it easy to meet the requirements of others.
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