14
．
OFFSET MEASUREMENT
Offset measurements are performed when a target cannot be positioned directly on a
point or when one needs to find the angle and distance of a point that can not be seen.
1. It is possible to find the distance and angle to a point you wish to measure by
positioning a prism and pole on a point that is slightly “off” from the target point
and measuring the distance and angle from the surveyed point to the offset point.
2. There are two measuring methods: distance offset and angle offset.
Ensure that the softkey
【
OFS
】
is allocated in the Meas Mode according to “22.3.
Defining softkeys”.
3. In the Menu Mode, selecting “7. Offset” can perform these functions also.
14.1 Distance Offset Measurement
Finding the point by entering the horizontal distance from the target point to the offset
point.
O f f s e t P o i n t
T a r g e t P o i n t
I n s t r u m e n t S t a t i o n
*
When the offset point is positioned to the left or right of the target point, the angle
formed by intersecting lines connecting the offset point to the target point and the
offset point to the instrument station is as close to 90° degrees as possible.
*
When the offset point is located in front or behind the target point, make sure that
the offset point is in line with the instrument and target.
45
Summary of Contents for CST202
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