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Chapter 4 Working with Cross Sections
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4 Accept the default station range to import or enter new values.
The plan line is then imported. Repeat the command as needed for each
horizontal alignment you need to import.
The transition or ditch lines are imported as straight line segments on the
current layer. They do not become alignments automatically. Use the Define
Plan Alignment command from the Ditch/Transition submenu to turn the
entities into a defined horizontal alignment.
Defining a Ditch or Transition as a
Horizontal Alignment
When you import a ditch or transition into the plan view, you can also define it
as an alignment, if required, since the transitions and ditches are just imported
as line entities. This step isnt necessary if you imported the lines for viewing or
plotting purposes only.
To define a ditch or transition as a horizontal alignment
1 From the Cross Sections menu, choose Ditch/Transition ä Define Plan
Alignment.
The following prompt is displayed:
Select entity (or POints):
2 Do one of the following to define the alignment:
n
Pick the end of the alignment entity, and then use a crossing window to
select the remaining entities.
n
Type PO to access the POints option and define the alignment by point
entry.
3 Press ENTER after you have selected all of the entities.
The command connects the entities and writes the data to an external database.
The alignment may consist of any combination of spirals, arcs, and lines. If the
alignment contains spirals, then the spirals must be polylines created using the
spiral creation commands. The remaining entities must be simple lines and arcs.