Figure 3. Sobel directional filters maps a) NW-SE b) E-W c) NE-SW d) N-S

From

Use of Landsat 8 OLI and Aeromagnetic Data for Structural Mapping of Pako Basin Region, North Benin

Raoufou D. Ibrahim GNAMMI YORO, Gérard Alfred Franck d’ALMEIDA, Karim ALLEK, Christophe KAKI, Nicaise YALO

Journal of Geosciences and Geomatics. 2020, 8(2), 45-57 doi:10.12691/jgg-8-2-1