Use of hidden point meas-
urements:
For poles surrounded by heavy undergrowth,
where it is not possible to measure the pole
directly without taking time to cut a path
through the undergrowth.
Changing coordinates of a point which has been previously used in hidden
point measurements does not result in the hidden point being recomputed.
A hidden point can be measured by
•
Bearing and distance
•
Two bearings
•
Two distances
•
Chainage and offset
•
Backwards bearing and distance
A hidden point measurement device can be attached to the instrument such
that the measurements are automatically transferred to the instrument.
If configured, heights are taken into account. Refer to "37.5.8 Hidden Point
Measurement Including Heights" for information on configuring height offsets.
Device height
and
Target height
configured in
Hidden Point Settings
are
applied when the hidden points are computed.
Difference in height
in
Meas-
ure Hidden Point
is the value directly from the hidden point measuring
device.
Type
Description
Point coding
Available in
Hidden Point Result
after the calculation of a
hidden point.
Free coding
Free coding of hidden points is identical to coding of man-
ually measured points.
Quick coding
Not available.
Azimuth
is used throughout this chapter. This term should also always be con-
sidered to mean
Bearing
.
Auxiliary points are used to compute azimuths required for the calculation of
hidden point coordinates. Auxiliary points can be points existing in the job or
they can be manually measured. The point ID template configured for
Auxiliary
points
in
ID Templates
is applied.
37.5.2
Hidden Point Methods
Description
One point must be known. It
•
can exist in the job.
•
can be manually measured during the hidden point measurements.
•
can be manually typed in.
☞
Hidden point meas-
urement methods
☞
Heights
Coding of hidden
points
☞
Auxiliary points
Bearing & Distance
Apps - The Toolbox
437