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24. ROUTE SURVEYING
Calculation using BCC as reference:
"ECC
ETC Calculation"
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
"BTC
BCC Calc."
3.
Input the coordinates of the BTC point
(reference point). Press [OK] to set
the input values.
ECC-ETC
Q Stationing Chainage
Stationing Chainage
ETC
Q
ECC
BP
AZ
Curve length
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
Parabola
BTC
ECC
ETC Calc.
BCC Calc.
Np :
472345.621
Parabola/BTC PT
Ep :
203647.972
REC
LOAD
OK