Spectra Precision Survey Pro v5.4 User Manual

Page 47

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BS Point [2]: Backsight point. The station location will be set from the
coordinates of the known point. The backsight circle orientation will also
be set to 0°00’00” in that case.

•

New Point [3]: This is a variant of backsight azimuth in which the azimuth
is given to a new point you would like to measure and add to the job.

The diagram below illustrates the three possible scenarios.

NOTE: A variant to this procedure exists (whatever the scenario used) if the

Survey with

True Azimuths setting is enabled (see Job > Settings > Surveying tab). In this case, the
backsight circle will always be set automatically to the true azimuth, either the entered
one (

BS Azimuth then renamed “True Azimuth” scenario and New Point scenario) or the

calculated one (

BS Point scenario).

The three scenarios are detailed below with the

Survey with True Azimuths option

disabled.
Start the station setup as follows:

• Go to the Main Menu, then tap

Survey > Station Setup.

• Choose

Setup Type= Known Point.

• Enter the name of the station setup point in the

Occupy Point field. The

point name can be entered directly, or, picked from the map or point list
using the

button.

• If you wish to ignore elevations in your job, check the

2D Survey box. You

will otherwise enter the height of instrument in the

HI field.

• Tap

Next.

Then, of the three possible options, choose the one that is suitable for your job:

1. If you choose

BS Azimuth:

• Aim the instrument in the direction of a known or assumed azimuth.

[2]

Known Backsight Point

Known Station Point

[3]

New Backsight Point

Known Station Point

[1]

Known Station Point

Known Azimuth Direction