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Chapter 4 Working with Cross Sections
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To sample the existing ground section data from one surface
1 Create and define the horizontal alignment.
For more information, see the chapter "Alignments in the AutoCAD Land
Development Desktop Users Guide.
2 Define a surface.
For more information, see Creating Surfaces in the chapter Creating Surface
Models in the AutoCAD Land Development Desktop Users Guide.
3 From the Cross Sections menu, choose Existing Ground ä Sample From Surface
to display the Select Surface dialog box.
The Select Surface dialog box lists all the currently defined surface names.
NOTE
The Select Surface dialog box is displayed only if there is no current surface
selected.
4 Select the desired surface, and then click OK to display the Section Sampling
Settings dialog box.
5 Enter the desired settings. All of the options and defaults shown in this dialog
box are described in detail in Changing the Cross Section Sampling Settings
in this chapter.
If you are using the Sample From Surface command to add another surface
definition to the sections, then you may want to make sure that the section
sampling settings are such that the stations and width match the current
existing ground sections. Enter No to overwrite the existing cross section file
prompt to add additional surface information.
To add additional cross sections after they have been sampled from a surface,
there are two options you can use. If you do not want to change the cross
sections definitions that have already been sampled, but want to add additional
stations, you can run the Sample From Surface command again and turn on the
Add Specific Stations option. Then click OK. After the station range prompt,
enter the new station values to be sampled, and press ENTER.