Survey - Hidden Points; Overview - Leica GPS1200 Series Technical Reference Manual

Survey - Hidden Points

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46.1
Description
Survey - Hidden Points

Overview

Hidden points cannot be measured directly by GPS. This is because they can not be physi-
cally reached or because satellites are obstructed, for example by trees or tall buildings.
• A hidden point can be calculated by measuring distances and/or azimuths to the hidden
point using a hidden point measurement device. Or for distances a tape may be used.
Refer to "22.7 Hidden Point" for information on supported hidden point measurement
devices.
• Additional auxiliary points may be manually occupied.
• Bearings may be computed from previously occupied points.
In contrast to the COGO application program, hidden point measurements is more of a
measuring application program than a calculation application program.
Example
Application:
Aim:
GPS1200
Completing a survey of telegraph poles for a telecom-
munication company.
The telegraph poles must be surveyed to 0.3 m accu-
racy in plan but height is not of concern.
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