Leica TPS1200 series Technical Reference Manual page 931

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Properties of hidden

Hidden point tasks

Hidden Point

The properties stored with the hidden point and auxiliary points are:

Instrument source

The Hidden Point application program can be used for the following tasks:

The hidden point program may be used to obtain accurate three dimensional coordinates

for a point that is currently blocked from direct measurement by an obstruction between

the point and the instrument.

Determination of flow line locations and elevations in manholes, without measuring from

the rim of the manhole to the flow line and estimating corrections for nonverticality of the

measuring tape and eccentricity from the measurement on the rim to the horizontal loca-

tion of the flow line;

Reflector n - auxiliary point Hidden point

Hidden Point

Distance from reflector 1 to reflector 2

Distance from reflector 1 to reflector 3

Hidden point