In order to use the station offset functions, you must create a
Point Group (formerly called a batch point file or point file)
defining a centerline alignment. The Coordinate Management >
Point Groups > Create section describes how you can create a
Point Group.
To illustrate the use of point groups in the various station offset
features, the following point group file will be used:
7.25+ (Slope in, 1st vert. Curve)
1.75- (Slope out, 1st vert. curve & slope
in, 2nd vert. Curve)
200* (Vertical Curve Length curve 1)
/123.50 (PVI Elevation curve 1)
*1300 (PVI Station curve 1)
2.00– (Slope out of curve 2)
*1750 (PVI Station curve 2)
300* (Curve Length curve 2)
1000 (Subgroup name - also default beginning
station)
2001 (Point ID at Sta. 10+00)
2002 (Point ID at PC of Curve)
-2003 (Radius point ID, ’-’ indicates
counter clockwise)
2004 (Point ID at PT of curve)
2005 (Point ID at PC of curve)
+2006 (Radius point ID , ‘+’ indicates
clockwise curve)
2007 (Point ID of PT of curve)
2008 (Point ID of PC of curve)
+2009 (Radius point ID, ‘+’ indicates a
clockwise curve)
2010 (Point ID of PT of curve - last entry in
subgroup and in file)
NOTE: Information shown in parenthesis are comments used here for
explanation and do not appear in the point group file
itself.
