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25. ROUTE SURVEYING
9. In the screens for the KA1 point, KE1 point, KE2 point, and
KA point that have been found, press
[CENTER]
to move to
centerline peg settings.
Input Sta..ing (stationing to the CL peg) and press
[OK]
to
calculate the coordinates of the arbitrary centerline peg. The
results are then displayed on the screen.
10.Press
{ESC}
repeatedly to finish 3 Point calculation and
return to <Road>.
• Press
[WIDTH]
to move to the width peg setting screen.
"25.2 Straight Line Calculation"
• The centerline peg can be set-out by pressing
[S-O]
.
• In the case of a clothoid with no transition curve, the KA1 Point, KE1 Point, and KA2 Point can be found in
step 8.
• In the case of a circular curve, the BCC Point and ECC Point can be found in step 8.
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".
25.7 Intersection Angle/Azimuth Angle Calculation
O K
3 P T C u r v e / C L p e g
S t a . . i n g
1 9 5 . 3 8 6
m
N
E
1 6 7 . 2 8 9
3 P T C u r v e / C L p e g
1 3 7 . 5 1 7
S t a . . i n g
1 0 0 . 0 0 0 m
WIDTH
REC
S-O
CENTER
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