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the actual True position on earth, the offset equal to this difference will be in the rover
position as well.
Figure 1
It is often enough to know the precise position of an object relatively to the base station
but for some applications like survey and mapping it is critical to get an accurate absolute
position. In this case, the offset delta X, delta Y, delta Z between actual True position and
the Base station position should be avoided or reduced.
Caution: The absolute position of the rover is accurate only to the same accuracy as the position
of the base station.
Proper positioning of the base station is a key to successful data collection. The shift of
base coordinates will keep the collected data precise but will make it inaccurate (which is
absolutely fine for volumetric measurements but unacceptable if you have to tie collected
data to the global coordinates). For example, if you are processing the map using data
collected by RTK-equipped drone using corrections from the shifted base your map will be
later geo-referenced with the same offset (figure 2).
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