Sokkia iM-50 Series Operator's Manual page 136

3. Input the coordinates of the BP point (reference point).
Press [OK] to set the input values.
4. Input the coordinates of the IP point, then press [OK].
5. Input the coordinates of the EP point, then press [OK].
6. The IA ang (intersection angle), direction (of curve), BP-IP
(BP-IP length), and IP-EP (IP-EP length) are calculated
from the coordinates of the three input points. The results
are then displayed on the screen.
Check the data, then press [OK].
• Press {ESC} to return to the previous screen to make
alterations to this data.
7. Input curve properties: parameter A1, parameter A2, curve
radius, and St. ofs (BP Point offset).
8. Press [OK] in the screen shown in step 7 to calculate the
coordinates and follow-up distance of the KA1 point, KE1
point, KE2 point, KA2 point. The results are then displayed
on the screens shown here. Press {}/{} to switch
between <3PT Curve/KA1>/<3PT Curve/KE1>/<3PT Curve/
KE2>/<3PT Curve/KA2>.
3 P T C u r v e / B P
N p :
E p :
LOAD R E C
3 P T C u r v e / E P
N p :
E p :
LOAD R E C
3 P T C u r v e
I A
D i r e c t .
B P - I P
I P - E P
3 P T C u r v e
P a r a A 1
P a r a A 2
R a d i u s
S t . o f s
3 P T C u r v e / K A 1
N
E
S t a . . i n g
WIDTH
3 P T C u r v e / K A 2
N
E
S t a . . i n g 1 9 5 . 3 8 6 m
WIDTH
131
25. ROUTE SURVEYING
1 0 0 . 0 0 0
1 0 0 . 0 0 0
O K
1 0 0 . 0 0 0
3 0 0 . 0 0 0
O K
9 0 0 0 ' 0 0 "
R i g h t
1 4 1 . 4 2 1 m
1 4 1 . 4 2 1 m
O K
5 0 . 0 0 0 m
5 0 . 0 0 0 m
6 0 . 0 0 0 m
0 . 0 0 0 m
O K
1 4 2 . 0 5 2
1 4 2 . 0 5 2
5 9 . 4 7 1 m
REC S-O CENTER
・
・
・
1 4 2 . 0 5 2
2 5 7 . 9 4 8
REC S-O
CENTER