Casagli, Nicola

Farina, Paolo

Guerri, L.

Righini, Gaia

Tarchi, D.

English

Florence Research

Geophysical Research Abstracts, Vol. 7, 03393, 2005SRef-ID: 1607-7962/gra/EGU05-A-03393© European Geosciences Union 2005The use of Ikonos-2 image for landslides mapping onStromboliN. Casagli (1), L. Guerri (1), P. Farina (1) G. Righini (1), D. Tarchi (2)(1) University of Firenze, Earth Sciences Department, Firenze, Italy, (2) IPSC/HSU unit, JointResearch Centre, Ispra (VA), ItalyThe potential of remote sensing for the monitoring of the Earth environment and thedetection of its temporal variations is well known. New generation very high reso-lution (VHR) satellite imagery (IKONOS, Quickbird) could provide a powerful toolfor quickly production of regional cartography at scale 1:2000, with a relative lowcost/benefit ratio. On December 2002 Stromboli modified its typical strombolian ac-tivity producing lava flows channeled within its steep NW flank, known as Sciara delFuoco, and on December 30th a big landslide occurred on the Sciara, falling into thesea and producing a tsunami. In the framework of an extensive monitoring system setup by National Civil Protection Department (DPC) on the volcano an Ikonos-2 im-age, dated 29 April 2003, was acquired, processed and photointerpreted for updatinglandslides map. In order to improve visual interpretation of the optical data, standardradiometric image processing was carried out on the multispectral bands for contrastenhancement; furthermore multispectral bands were merged with the panchromaticone in order to obtain a final multispectral image of 1 m spatial resolution. Photoin-terpretation of landslides and different features was then performed: ridges, valleysand morphological aspects were clearly evident and land cover information, such asvegetation, soils, rock outcrops, were also visible. The image was overlaid on a Dig-ital Terrain Model (DTM) of 5 m resolution and 3D perspective view was obtained.The results achieved using the Ikonos imagery were very promising as the 1 m spa-tial resolution allows even small mass movements to be mapped: new landslides wereidentified and classified regarding typology and state of activity; in particular on theSciara del Fuoco different portions and escarpments of the big landslides occurred onthe 30th December 2002 were mapped. Furthermore using these information, DPCwas able to map out new tracks to the top of the volcano.

The use of Ikonos-2 image for landslides mapping on Stromboli

https://flore.unifi.it/bitstream/2158/384467/1/Casagli%20et%20al%20GRA%20vol%207%20EGU%202005.pdf

The use of Ikonos-2 image for landslides mapping on Stromboli

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