Exercise 1: Limiting Imported Surface Data - Autodesk CIVIL3D - CIVILDESIGNCOMP 2007 SLM CD Tutorials Manual

Exercise 1: Limiting Imported Surface Data

In this exercise, you will use a data clip boundary to restrict the quantity of
points that is referenced by a surface.
Points that are in the point file, but outside the specified data clip boundary,
will be ignored when the surface is built and during any subsequent surface
editing operations.
For more information, see the AutoCAD Civil 3D Help topic Boundaries.
Add a data clip boundary to a surface
1 Open Surface-2.dwg, which is located in the
819).
2 In Toolspace, on the Prospector tab, expand the Surfaces collection.
Expand the EG surface.
The EG surface is currently empty. In the following steps, you will use
the red polyline in the drawing to create a Data Clip boundary, which
will restrict imported surface data to the extents of the boundary. Then,
you will import a relatively dense LIDAR point file and examine the
results.
3 Expand the EG surface
Click Add.
4 In the Add Boundaries dialog box, specify the following parameters:
Name: Site
Type: Data Clip
Mid-Ordinate Distance: 1.000'
5 Click OK.
6 In the drawing window, click the red polyline.
The polyline is added to the EG surface definition as a boundary. The
presence of a boundary in the surface definition is indicated by the
marker next to the Boundaries item on the Prospector tab. When the
Boundaries collection is selected, the boundaries that have been added
to the surface appear in the Prospector list view.
In the following steps, you will add a relatively dense LIDAR point file
to the surface definition. The point file will be added only within the
extents of the data clip boundary that you just added.
74 | Chapter 5 Surfaces Tutorials
tutorial drawings folder
Definition collection. Right-click Boundaries.
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