Spectra Precision Survey Pro v5.3 - Manual (Page 43)

35
Instrument Setup Station Setup on a Known Point
The name and coordinates of the known point where the station is set up can
be picked from within the open job. This method offers three different
scenarios:
• BS Azimuth [1]: Backsight azimuth. The station location will be set from the
coordinates of the known point. The circle is set using the value you enter
in the
Backsight Circle field. The backsight azimuth will be the value you
enter.
Typically, this is an "assumed" backsight and the value will be 0 or North.
In most cases when using this method, the BS azimuth and the circle will
both be set at 0.
There are two variations on this, depending on whether the Survey with True
Azimuths setting is enabled or not. If it is enabled, then the circle will
always be set to what the BS Azimuth is. If not, then it's your choice what
to set.
• BS Point [2]: Backsight point. The station location will be set from the
coordinates of the known point. The station circle orientation will be set
from the azimuth between the station point and another known point
(backsight) in the job.
• 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.
[2]
Known Backsight Point
Known Station Point
[3]
New Backsight Point
Known Station Point
[1]
Known Station Point
Known Azimuth Direction