Classification of a Sentinel-2 image with post-processing using field knowledge. This research was funded by the Copernicus RawMatCop programme, through funding from EIT RawMaterials and the European Commission DG Internal Market, Industry, Entrepreneurship and SMEs (DG GROW). https://eitrawmaterials.eu/eit-rm-academy/rawmatcop/, in the scope of project CopX: "Geospatial mining transparency through Copernicus and MapX" EPSG:3857