What do you need a reference point for?
A reference point will enable you to compare your actual GPS coordinates with the saved GPS coordinates and compensate for any drift (displacement).
A fixed permanent point on the ground is needed for calibrating the GPS signal. This is the so-called reference point. When the GPS signal is calibrated, the stored coordinates of the Reference point are compared and matched with the current coordinates.
If you do not set a reference point nor calibrate the GPS signal each time before starting work, the following will happen:
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- The saved GPS coordinates for the field boundary, guidance lines, etc. will differ from the actual values.
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- As a result, you may miss applying the product over areas in the field which are outside of the field boundaries according to the GPS.
In order to ensure maximum precision:
- 1.
- Set a reference point for each field at the first product application.
- 2.
- Before processing a field for which you have already set the reference point, calibrate the GPS signal.
- 3.
- If the field is large and you will process this over several hours, perform a calibration on the GPS signal.