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24. ROUTE SURVEYING
The coordinates of a cardinal point, an arbitrary centerline peg, and width pegs
can be found from an intersection angle, curve properties, and either the
coordinates of 1 IP point of intersection or the azimuth angle from the BP Point to
the IP point.
It is then possible to proceed with the setting-out of the cardinal point, centerline
peg, and width pegs
PROCEDURE
1.
In the second page of the OBS mode
screen, press [MENU], then select
"Road".
2.
Select "IP&Tan" to enter the
intersection angle/azimuth angle
calculation menu.
3.
Input the coordinates of the BP point
(reference point). Press [OK] to set
the input values.
24.7 Intersection Angle/Azimuth Angle Calculation
BP point (P1)
IP intersection point (P2)
Intersection angle (IA)
BP to IP distance (DIST1)
IP to EP distance (DIST2)
Clothoid parameter A1
Clothoid parameter A2
Curve radius R
KA1
KE1
KA2
KE2
P2
P1
Follow-up distance
Offset
P3
IA
A2
A1
R
AZ
DIST1
DIST2
3 P T C u r v e
I P & Ta n
A l i g n m e n t
E D M
Np:
LOAD R E C
Ep:
I A & Ta n g e n t / B P
1 0 0 . 0 0 0
O K
1 0 0 . 0 0 0