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25. ROUTE SURVEYING
Calculation using KE2 as reference: "KE
KA Calculation"
• If the following conditions are not met, coordinate calculation cannot be
performed.
"KA
KE Calculation 1": 0 ≦ curve length ≦ 2A
"KA
KE Calculation 2": 0 ≦ KA - reference point curve length ≦ 3A
0 ≦ KA - target point curve length ≦ 2A
"KEKA Calculation": 0 ≦ KA - KE curve length ≦ 3A
0 ≦ KA - target point curve length ≦ 2A
PROCEDURE Calculation using KA Point as reference
1. In the second page of the OBS mode
screen, press [MENU], then select
"Road".
2. Select "Spiral" to enter the spiral menu
then select "KA-KE 1".
KE point (P1)
KE tangential angle (AZ)
Clothoid parameter A
KE to KA curve length (L)
KE follow-up distance (DL1)
Target point follow-pu distance (DL2)
Route width (BL)
KE-KA
Curve length
Q Stationing Chainage
Stationing Chainage
KA
Q
KE
BP
AZ
Road
Occ.Orien.
Line
Circ.Curve
Spiral
Parabola
KA-KE 1
Spiral
KA-KE 2
KE-KA
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