Spiral Curve Stakeout
This feature allows you to calculate points along a spiral at a
given interval and offset for use in staking out the curve in the
field.
Curve Description <enter if done>: This text description is
only used to identify the spiral curve data printed at the command
line and written to the print file.
Enter the first point: Enter or pick a point on the tangent line
going into the spiral.
Enter first bearing <100.000000>: Enter the bearing going
toward the P.I. of the spiral from the first point.
Enter the second point: Enter or pick a point on the tangent line
going out of the spiral.
Enter second bearing <100.0000>: Enter the bearing from the
tangent point just defined to the P.I. for the spiral.
Enter Radius [Degree of Curve] <0.0000>:
Radius option: Entering the radius is the default option as
indicated by the wording of the prompt.
Degree of Curve option: To change to entering the degree of curve
type D and <Enter>.
Once you have chosen the type of data you wish to specify, type or
pick the radius of the simple curve between the two tangents or the
degree of curve.
Enter spiral length in <0.000000>: enter the length of the
spiral from the TS (Tangent to Spiral) to the SC (Spiral to Curve).
Enter zero for no spiral in.
Enter spiral length out <0.000000>: enter the length of the
spiral from the CS (Curve to Spiral) to the ST (Spiral to Tangent).
Enter zero for no spiral out.
Enter P.I. station <0.0000>: Enter the station of the PI. For
example: station 460+28.52 is entered as 46028.52
Enter station interval <0.0000>: Specify the interval at
which you wish to stake the spiral. For example, enter 50 to stake
every 50 units.
Enter offset from centerline <0.0000>: This can be a positive
or negative number depending on whether you want to set points
inside or outside the spiral. If you want to place points on the
centerline, simply press <Enter> to use the 0.00 default
value.
Odd stations to be staked (6+34.22 as 634.22): You can stake as
many odd station locations as needed. When done press <Enter>
without entering a station value.
The points will be calculated and stored in the coordinate file.
The station and offset will be placed in the description field.
The results will be printed at the command line and in the print
file.
Continue to stake another spiral or press <Esc> or
<Enter> at the Curve Description <enter if done>:
prompt to end the command.
Prompts
Curve Description <enter if
done>: This text description is optional and is used to
identify the spiral curve in the output
Enter the first point:
Enter or pick a point on the tangent line going into the
spiral.
Enter first bearing
<100.000000>: Enter the bearing going toward the P.I.
of the spiral from the first point.
Enter the second point:
Enter or pick a point on the tangent line going out of the
spiral.
Enter second bearing
<100.0000>: Enter or pick the bearing from the second
tangent point to the P.I. for the spiral.
Enter Radius [Degree of Curve]
<0.0000>: Enter or pick the radius. or, to change to
entering the degree of curve, type "D" and Enter.
Enter spiral length in
<0.000000>: enter the length of the spiral from the TS
(Tangent to Spiral) to the SC (Spiral to Curve). Enter zero
for no spiral in.
Enter spiral length out
<0.000000>: enter the length of the spiral from the CS
(Curve to Spiral) to the ST (Spiral to Tangent). Enter zero
for no spiral out.
Enter P.I. station
<0.0000>: Enter the station of the PI. For example:
station 460+28.52 is entered as 46028.52
Odd stations to be staked (6+34.22
as 634.22): Enter as many odd stations as needed. When done
press Enter.
Pulldown Menu Location:
CG-Survey > Cogo > Curves
Keyboard Command:
cg_scs
Prerequiste:
coordinate file