WISE WFD groundwater body horizons reported under Water Framework Directive

For the Water Framework Directive (WFD) spatial data on groundwater bodies (GWBs) the borders of polygons are their projection on the surface. As GWBs are three-dimensional entities but represented as two-dimensional polygons, it is necessary that multiple overlapping groundwater bodies at different depths with non-identical boundaries can be distinguished in different horizons (layers), the reporting of groundwater bodies horizons is See more