Sokkia im-101 Operator's Manual page 134

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.
4. Input the coordinates of the IP point, then press [OK].
• The azimuth angle to the IP point can be set by pressing
[AZMTH] on the second page. Press [COORD] to return to
coordinate input.
5. Enter the curve direction, parameter X, radius, offset, and
stationing chainage.
6. Press [OK] in the screen shown in step 5 to calculate the
center peg coordinates. The coordinates are then displayed
in this screen.
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
Parabola/BTC PT
Np :
Ep :
LOAD
Parabola/CL peg
Direct.
Para X
Radius
St. ofs
Sta..ing
P a r a b o l a / C L p e g
N
E
A z m t h
WIDTH
128
25. ROUTE SURVEYING
BCC Calc.
ETC Calc.
472345.621
203647.972
REC OK
Right
133.000m
800.000m
0.000 m
OK
20.000 m
OK
4 7 2 3 6 5 . 6 2 0
2 0 3 6 4 8 . 2 1 5
0 4 6 ' 0 3 "
REC S-O CENTER