Fig. 6. Indicator (direct and cross) variograms of soil classes in the original soil map and realization maps. The first four are direct variograms. The last four are cross variograms. Or–The original soil map (corresponds to Fig. 5a). PV1–The first PV-realization (corresponds to Fig. 5c). TP1–The first TP-realizations (corresponds to Fig. 5f).