Temporal satellite imagery of two different years, obtained from Landsat TM and
ETM+, are used to determine the changes and the effects to the study area caused by the
tsunami. The general land use change data from Landsat TM is sufficient for large areas
such as our study area. A combination of data sources should help to show the effects of
the tsunami but they still would require future field work to improve the results. Thus, we
use Landsat imagery as our main data source combined with aerial photographs,
IKONOS high resolution imageries and a topographic map.