‘Natural Neighbors’ interpolation was
implemented in order to optimise the visualisation of weed distribution, because
linear triangulation turned out to set the standard in current weed research studies [8].
Other approaches in weed mapping including kriging [1] and co-kriging [10] have not
been focused in this study because the transferability of the above mentioned
approaches on weed mapping is currently uncertain [5], [8], [14]. Shapefile (a) had a