Screening the Flemish (Belgian) soil map for its currency

The currency of the Flanders drainage class map was evaluated using data from two monitoring networks: one with good spatial coverage but poor temporal coverage and another with better temporal but poor spatial coverage. We combine both networks to obtain point expressions for mean highest (MHW) and mean lowest water tables (MLW) by applying time series analysis and total least squares regression. The resulting MHW and MLW point data set was used to evaluate the currency of the existing map and to identify regional differences.