TPC Technote
Station/Offset Tools
TRAVERSE PC includes many Station/Offset tools. Most
are accessed from the Traverse View and modify the current traverse.
Others create new traverses and automatically add them to the Survey View. The
following discussion lists the Station/Offset tools available in TRAVERSE
PC, along with the steps to access them.
To change the format of the stations from 0+00.00
to 0+000.00, choose <Tools>
<Program Settings> <Units> from the Survey View and
choose the <Station Factor> you want.
Stations
Create stations at assigned intervals along an existing
alignment. You can choose one station interval for curves and spirals and
another for tangents. The resulting stations are added to a copy of the
original alignment which is inserted in the Survey Screen.
Enter the Traverse View for the alignment you want
and choose <COGO>, <Stations...>.
Station Offsets
Inserts two points in the current traverse at a requested
station. One is the station point along the alignment. The other is the
offset point from that station.
Go to the Traverse View for the alignment you want
and choose <COGO>, <Station Offsets...>.
Print Station Offsets
Print a Station Offset report for any traverse. The
traverse must be an alignment with offset points in it. Only the offset
points will be printed. The printout uses the form
| Point |
Station |
Offset |
| 102 |
12+50.0 |
45.00 |
where negative offsets are to the left, and positive offsets are to
the right.
Enter the Traverse View for the traverse you want and choose <Tools>,
<Station/Offset Report>.
Offset to Alignment
Combine the points from one traverse with the alignment
of another traverse. A third traverse is created which contains the resulting
station and offset points. Use this tool to combine site survey points
recorded as side shots with an existing or designed alignment. Then plot
the resulting traverse or use the Stations/Offset Report tool to get a
printout.
Go to the Traverse View for the traverse containing
the offset points and choose <COGO>, <Offset to Alignment>.
Select the alignment traverse you want and choose <OK>. On the Survey View,
you will see the new "Alignment/Offset" traverse.
Offsets from an Existing Station
You can add an offset point to an existing station
(any control point on an alignment). You can enter any combination of horizontal
distance, slope distance, etc. TRAVERSE PC computes the bearing of the
point from the station and uses the information you enter to compute the
position of the offset point.
Insert a point so that it follows the existing station,
then choose <Type>, <OFS=Offset>. Enter the information you
have.
Print/Display the Stationing of
an Alignment
You can display the stationing of the control points
in any traverses by including the letter "N" in the display sequence.
TRAVERSE PC will display two columns: one called "Station" which
is the computed station of the control point, and another called "Equation"
which displays any equations you enter.
Help Index
Look at the Station/Offset tools in the help index.
Either scroll down or type "S".
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