This command writes a centerline (.CL) file from a polyline in
the direction the polyline was drawn. The Northing and Easting for
each vertex of the polyline is written to the centerline file and
each arc in the polyline becomes a circular curve. After selecting
the polyline, the program shows the direction by drawing temporary
arrows along the polyline. To reverse the direction of the
polyline, there is a keyword option R for Reverse at the Command
line. Also, the Reverse Polyline command can be used to
switch the direction of a polyline.
For stationing the centerline, there is a Command line prompt
for entering the station at the beginning of the polyline and then
using the polyline segment lengths for the rest of the centerline
stations. Alternatively, there is a keyword option E for Ending to
specify the station at the end of the polyline and then back
calculating the centerline stations to the beginning using the
polyline lengths.
In addition to being used as roadway/corridor "baselines," a .CL file can also be used as the horizontal control for a Template Point Centerline.
Note: To convert lines and/or arcs into a polyline, use the Entities to Polylines command or the Join Nearest commandCenterline file to Write dialog
Enter the .CL file name to
create
Centerline station
[Reverse/Ending/<Beginning: 0+00>]: Press Enter to accept the default station value
specified or Type in the beginning
station then press Enter
Select polyline that represents
centerline: Pick the polyline that
represents your centerline
Pulldown Menu Location(s): Civil > Centerline, Survey
> Centerline, Field > Roads
Keyboard Command: clpline
Prerequisite: A polyline drawn in the direction of
increasing station values
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