Pentax R-2500NS Series - 4.5 Station setup [By Polar Coordinates]

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RO: Radial Offset
(RO: On the horizontal plane. Offset P: Along the line of measurement, thus along the slope)
VO: Vertical Offset (Along the third axis)
DO: Distance Offset (Along the line of measurement, thus along the slope)
TO:Tangential offset (TO:On the horizontal plane, perpendicular to the horizontal line
between Station and Point. Offset P: Along the slope)
Z
SP
RO
Offset Point : Offset P
X.Y
P
Z
SP
VO
Offset P
X.Y
P
Z
SP
DO Offset P
X.Y
P
X
SP
TO
Offset P
Y
P