Visible spectrometric indices of hematite (Hm) and goethite (Gt) content in lateritic soils: the application of a Thematic Mapper (TM) image for soil-mapping in Brasilia, Brazil

brasil brazil cartografia cartographie cartography fer ferralsol ferralsoles ferralsols goethite goetita hierro iron mapping minerales minerals oxides oxyde reflectance reflectancia remote sensing soil soil chemicophysical properties soil morphological features sol suelo thematic mapper trait morphologique du sol