Station Offset

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.

Alignment used for examples