By defining more TreatmentZone's in a CropField or ActivityField it is possible to specify site specific application of Product's or machine settings. TreatmentZone can also be used for the Operation Soil Sampling to specify the surfaces for which one SoilSample should be collected. TreatmentZone uses one or more Polygon's, i.e. a MultiSurface, to describe the surface(s) with uniform treatment. A TreatmentZone is only intended to specify treatments; i.e. application of products or the specification of working (for example working depth). To characterize properties of an area, like for example soil type, the PropertyZone is used. For the collection of Produce, harvesting, the HarvestingZone is used.