13) Comparison of ASTER and LANDSAT

Satellite imagery is very valuable in relatively early stage of exploration for vast area like Mauritania. Landsat data has been contributed in mineral resource exploration for long time. Now, ASTER (Advanced Spaceborne Thermal Emission and Reflection Radiometer) sensor data is widely used for earth resources exploration and environmental monitoring because of its higher resolution, higher spectral resolution, cross-track pointing capability, DEM availability and cost-effectiveness. In supplementary geological survey by JICA study team, ASTER imagery was processed for each target mineral and clay type, and used for ground-truth. Those processed imagery has been stored in GIS database with the other spatial information, and some of them will be disclosed in the archives through this website.