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25. ROUTE SURVEYING
PROCEDURE Calculation using BTC Point as reference
1. In the second page of the OBS mode screen, press
[MENU], then select "Road".
2. Select "Parabola" to enter the Parabola menu then select
"BTCBCC Calc."
3. Input the coordinates of the BTC point (reference point).
Press [OK] to set the input values.
4. Input the coordinates of the IP point, then press [OK].
• The azimuth angle to the IP point can be set by pressing
[AZMTH] on the second page. Press [COORD] to return to
coordinate input.
5. Enter the curve direction, parameter X, radius, offset, and
stationing chainage.
6. Press [OK] in the screen shown in step 5 to calculate the
center peg coordinates. The coordinates are then displayed
in this screen.
Road
O c c . O r i e n .
L i n e
C i r c . C u r v e
S p i r a l
P a r a b o l a
Np : 472345.621
Parabola/BTC PT
Ep : 203647.972
RECLOAD OK
Direct.
Parabola/CL peg
Radius
Para X
St. ofs
Right
0.000 m
800.000m
133.000m
OK
OK
Sta..ing
20.000 m
N
P a r a b o l a / C L p e g
E 2 0 3 6 4 8 . 2 1 5
4 7 2 3 6 5 . 6 2 0
A z m t h 0 4 6 ’ 0 3 "
REC S-O
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