Extraction of the stable component of electrical surveys of soils and the consequence on the mapping of their thicknesses

•AFACK enables to capture non-stationary effects affecting a spatio-temporal signal.•A significant improvement of a spatio-temporal signal is achieved thanks to AFACK.•AFACK provides the ability to get rid of conjectural factors affecting a signal.•Mono-temporal electric surveys lead to various patterns of a static soil property.•Stable components of electrical surveys are relevant to map a static soil property.