Phytophysiognomic and land use mapping of partial Alto Taquari basin using TM/Landsat and HRV/SPOT images

Abstract

TM/Landsat temporal images (dry and wet seasons) and HRV/SPOT images from a dry season, in analogical and digital presentation forms, were used in a physiognomic vegetation and land use mapping in part of Alto Taquari (MS) river basin. The images were available in form of color compositions (TM3B, TM4G and TM5R bands, and HRV1B, HRV2G and HRV3R bands). Visual interpretation was carried out considering the following vegetation and land use classes: Grassland, Savanna (Cerrado), Woodland (Cerradão), Savanna and aluvial forest, Aluvial forest, Disturbed formation, Cultivated pasture, Field crops, and Water bodies. The performance evaluation of TM and HRV products has shown a small superiority of HRV images, compared to TM images. The digital image processing was carried out over the Pedro Gomes topographic chart area, considering only the TM images. Principal component technique was applied in order to generate new images. These two new images were used in the Maxver digital classification procedure. The result of that classification was also transferred to the GIS and compared with visual thematic map through Kappa (KHAT) statistical parameter. The results have shown low similarity between these maps.