3.2 Methodology
Initially a pre-processing of data is done through correction of the cross-talk problem, of resampling from SWIR bands (spatial resolution: 30 to 15 m), of image registration, of atmospheric correction and rectification of ASTER images from both data sets 2002 and 2003. Afterwards the automatic image classification is done using a non-supervised ART2 algorithm considering Artificial Neural Network (ANN), followed by a post-classification to minimize the presence of isolated pixels. Finally the evaluation of accuracy is done, using Kappa statistics, related to ground truth, with maps on land use/land cover are generated for both data sets considered.
3.2 MethodologyInitially a pre-processing of data is done through correction of the cross-talk problem, of resampling from SWIR bands (spatial resolution: 30 to 15 m), of image registration, of atmospheric correction and rectification of ASTER images from both data sets 2002 and 2003. Afterwards the automatic image classification is done using a non-supervised ART2 algorithm considering Artificial Neural Network (ANN), followed by a post-classification to minimize the presence of isolated pixels. Finally the evaluation of accuracy is done, using Kappa statistics, related to ground truth, with maps on land use/land cover are generated for both data sets considered.
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