Statistical Sampling Strategies for Survey of Soil Contamination - Dealing with Contaminated Sites: From Theory Towards Practical Application - page 195

Fig. 4.11 Map with maximum exceedance probability of the threshold concentration, used in
selecting second infill sample
Fig. 4.12 Second spatial infill sample ( S 2 )of30locations
independent of the measured concentrations. So, we do not need the measurements
in order to compute the error variance at the nodes of the interpolation grid. This
implies that, given the variogram, we may search for the sampling pattern with
minimum value for the kriging variance, averaged over the nodes of the interpolation
grid