Spectra Precision Survey Pro CE v3.6 User Manual - Manual (Page 343)

Survey Pro Reference Manual
R-186
Horizontal Curve Layout
&XUYH +RUL] /D\RXW
The Horizontal Layout screen is used to assist in the layout of a
horizontal curve by computing the direction and distance to points on
the curve using a variety of methods.
Method : The method determines how the points
on the curve are laid out. Each method is
described below.
•
PC Deflection : provides deflection angles and
distances to each station on the curve as if
occupying the PC and backsighting the PI. The
results are given in the following format:
o Station : is the current station on the curve.
o Deflection : is the angle to turn to the current
station.
o Long chord : is the distance from the PC to
the current station.
o Short chord : is the distance from the
previous station to the current station.
RP
Chord
PT
PI
PC
Deflection
Current
Station
PC Deflection