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25. ROUTE SURVEYING
PROCEDURE Calculation using ECC 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
"ECCETC Calc."
3. Input the coordinates of the ECC point
(reference point). Press [OK] to set
the input values.
4. Input the azimuth angle of the arbitrary
point on the line tangential to the KE
point, then press [OK].
• Pressing [COORD] sets the
coordinate toward the tangential
direction. Pressing [AZMTH] on the
second page returns to the screen
for inputting the azimuth angle.
5. Enter the curve direction, parameter
X, ECC-ETC curve length, ECC
stationing chainage and Q stationing
chainage (Set out pt sta).
Parabola
BTC
ECC ETC Calc.
BCC Calc.
Np : 475073.398
Parabola/ECC PT
Ep :
203897.770
RECLOAD OK
Parabola/2nd tan pt
Azmth
20.0000
COORD
OK
Direction.
Parabola/CL peg
OK
ECC-ETC Length
Para X
Right
140.000m
133.000m
OK
Set out pt sta
20.000m
ECC Sta..ing
0.000 m
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