4.6
Base Shift
Typically, the Real-time kinematic (RTK) operation requires a data link to send
observations or corrections from the base station to the rover, and then the rover will
calculate its position in real time.
Within a project, when the base receiver is restarted or moved, the base coordinated
system will shift each time the position of the base station is changed. Normally, the
coordinates determined by the base station that set up on a control point should be in
the same coordinate system. However, coordinates determined by the base station
that set up on an autonomous point should be carried out a base shift, which provided
by CHC LandStar 7 software, to keep their base station messages the same as the initial
coordinate system.
Notes
: To perform the base shift, make sure that the two base stations have been
linked together by at least one common point that surveyed with the same position,
which means that the common point not only has the coordinate determined by the
initial coordinate system, but also own the coordinate surveyed from another base
coordinate system that need to be shifted.
To perform a base shift:
(1)
In the main menu, tap
Survey
→ tap
Base Shift
.
(2)
Tap the icon at the end of the row of
GNSS Point
field to select the common point
surveyed from the base coordinate system that needs to be shifted.
(3)
Tap the icon at the end of the row of
Known Point
field to select that common
point determined by the initial coordinate system.
(4)
The offset information of base coordinate system that needs to be shifted will be
displayed automatically.
(5)
Tap
OK
→ a message will pop up asking the user whether to apply the shift
parameters.
(6)
If tap
Yes
button, all the coordinates determined by the current base coordinate
system will be translated. Also, the
Point Library
screen will pop up to help user
check whether the coordinates determined by the current base coordinate
system have changed.
Notes
:
The coordinates translated are local grid coordinates rather than WGS-84
coordinates.
4.7
Data Export
(1)
In the main menu, tap
Project
→ tap
Export
.
(2)
Select one data format (for example,
Custom Format
) according to user’s
