Technical data

Creating Existing Ground Profiles

You can draft an existing ground profile in your drawing and then

add vertical alignment geometry to represent what the final roadway

will look like in profile view. The following illustration shows existing

ground profiles drawn in different directions.

To generate the station/elevation information required to plot a

profile, you can extract data from a surface or from an ASCII text file,

or you can type in station/elevation values using the profile editor.

Key Concepts

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When sampling the profile from a surface model, be certain that

the correct surface model is set current.

■

Verify that the existing ground surface model is accurate. Create a

model that best reflects the conditions on the site.

■

You can set independent scales for horizontal and vertical features.

Make sure that the vertical scale is set properly for your drawing.

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A profile has an invisible block attached to it to locate it in the

drawing. If you move the profile, first undefine the profile to

remove the old profile definition block, then redefine the profile

to create a new profile definition block. These commands are in

the Profiles

➤

Create Profile menu.

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If you have more than one profile in a drawing, then use the

Set Current Profile command to select the correct profile to

use in subsequent profile commands. This is a graphical

method of selecting the current profile by picking a location

within the profile.