Geomorphometric Maps of Volcanic Areas through Multidimensional Analyses

The geomorphometric classifications of local topographic gradients for the Latera caldera (Italy) and Peteroa Volcano (Argentina) areas are introduced and compared. The adopted method is Tandem Analysis on correlation matrices. Input data are obtained by processing raster Digital Elevation Models extracted from ASTER stereo-pairs. The resulting maps show the spatial distribution of homogeneous landform units, highlighting the impact of erosional and tectonic processes on the whole reliefs. Moreover, each class is being described by either mean gradient values or mean topographic attributes such as elevation, slope and aspect. Next, these data are interpreted in terms of morphological setting.