Spectra Precision FOCUS 2 Series - Coordinate KA1; Arc Length

SPECTRA PRECISION FOCUS 2 SERIES TOTAL STATION USER GUIDE
B – Calculate Road Alignment
156
Coordinate KA1
N
KA1
= N
IP1
− D
1
⋅ c o s α
1
E
KA1
= E
IP1
− D
1
⋅ sin α
1
Bearing from BP to IP1, α
1
= 74°03’16.6’’ :
N
KA1
= 1300 –182.468 ∗ cos 74°03’16.6’’ = 1249.872 m
E
KA1
= 1750 –182.468 ∗ sin 74°03’16.6’’ = 1574.553 m
Arc length
LRLAt
1
t
2
))+(–(=
R111°55′47″ 2( 18°20′06″×–())=
100 75°15′35″
π
180°
-----------


=
131.353m=