Due to data availability, the latest imagery before the tsunami happened, acquired
by Landsat 7 in 2002, is used in this study as the pre-event image. Similarly, for the
topographic map of the province, only the latest image of the year 1985 is available.
High resolution images from IKONOS covering only a small section of the study area are
available without charge.
In order to assess the impacts of the December 26, 2004 tsunami, many
procedures of image analysis, using remote sensing and GIS techniques, were performed
in this study: image pre-processing, image classification, accuracy assessment, image
segmentation, change detection, tsunami impact assessment