Leica GPS1200 Series Technical Reference Manual page 1219

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Hidden point measure-

ment methods

Magnetic declination

Survey - Hidden Points

Use of hidden point measurements: For poles surrounded by heavy undergrowth where it

Changing coordinates of a point which has been previously used in hidden point measure-

ments does not result in the hidden point being recomputed.

Hidden point measurements are possible for <R-Time Mode: Rover> and <R-Time Mode:

None>. For <R-Time Mode: None> the hidden point can be calculated in LGO.

A hidden point can be measured by

Bearing and distance

Double bearing

Double distance

Any magnetic declination configured for <Mag Declin:> in CONFIGURE Units & Formats,

Angle page is applied when the hidden points are computed. The azimuth must be entered

manually or it must be measured with a hidden point measurements device.

Heights are taken into account if configured. Refer to "22.7 Hidden Point" for information on

configuring height offsets.

<Device Ht:> and <Target Ht:> configured in CONFIGURE Hidden Pt Device Offsets are

applied when the hidden points are computed. <ΔHeight:> in HIDDEN PT Hidden Point

Measurement is the value directly from the hidden point measuring device.

is not possible to directly measure the pole without

taking a lot of time to cut a path through the under-

Chainage and offset

Backwards bearing and distance

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