Spectra Precision ProMark Field Software - Manual (Page 56)

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Logging with Offsets
Point Offset Use this function when you cannot position the antenna
exactly over the desired point. The offset is defined as a
bearing (
β
) and a horizontal distance (d) to that point from
your current location.
Set the horizontal distance back to 0 to cancel the point
offset.
In a real-time RTK project, the centimeter-accurate RTK
position saved to the job will truly be that of the point you
want to survey – taking into account the entered offset – and
not the one from which the computation was performed.
In a post-processed project, the same will be true for the
DGPS/SDGPS point saved to the job. But the centimeter-
accurate position you will get through post-processing using
GNSS Solutions will NOT be that of the desired point but that
of the point on which data collection was made.
In that case, you will have to manually apply the offset to the
point computed by GNSS Solutions, using the offset
parameters found for the point in the last two columns of the
job file (remember the job file is in csv format).
Line Offset Use this function when you cannot position the antenna
exactly over the desired line. The offset is defined as a
direction (left or right) and a horizontal distance (d)
perpendicular to that line from your current location.
In a real-time RTK project, the centimeter-accurate RTK
positions saved to the job will truly be those of the points
forming the line you want to survey – taking into account the
entered offset common to all these points – and not those
from which the RTK positions were actually determined.
In a post-processed project, the same will be true for the
DGPS/SDGPS points saved to the csv job. But the centimeter-
accurate positions you will get for the line through post-
processing using GNSS Solutions will NOT be those of the
desired line but those of the points on which data collection
was actually made.
In that case, you will have to manually apply the offset to the
points computed by GNSS Solutions, using the offset
parameters common to all the points forming the line. The
offset parameters can be found in the last two columns of the
job file (remember the job file is in csv format) for the series
of concerned points.
β
d
N
Left
d
Right
d