Kwabena Abrefa Nketia^1,2, Amanda Maria Ramcharan³, Stephen Boahen Asabere¹, Stefan Erasmi⁴ and Daniela Sauer¹, (1)Georg-August-Universitaet Goettingen, Physical Geography, Goettingen, Germany, (2)Council for Scientific and Industrial Research - Soil Research Institute, Soil Genesis, Survey and Classification, Kumasi, Ghana, (3)Pennsylvania State University Main Campus, State College, PA, United States, (4)Georg-August-Universitaet Goettingen, Cartography, GIS & Remote Sensing, Goettingen, Germany