Vol. 7, No. 1, 21-29, 2008

Integration of differential SAR interferometry and ancillary GIS data for the study of superficial deformations
Angela Losurdo, Savina Pacifico, Valentina Sarli, Antonio Colangelo and Maurizio Leggeri

The aim of the present work is to study possible correlations between territorial and climatic data, and motion data obtained by Multitemporal Differential SAR Interferometry. In particular, these SAR data refer to movements occurring on selected points exhibiting coherent radar backscattering properties. They are targets that remain changeless between acquisitions, for example man-made structures as buildings and natural reflectors as rocks. The study area includes some counties of Potenza province in the Basilicata region (Italy). In order to ensure an adequate distribution of good coherent points, the analysis was restricted to urban centres. This approach is also justified by the fact that landslides affecting the urban centres have the highest socio-economic impact.

Motion data were analysed statistically and overlaid on orthophotos and different themes in GIS. Some of them represent intrinsic factors of the instability of sides: hydrologic risk map, lithologic map, Digital Elevation Model (DEM), slopes and aspect maps derived from the DEM. Others represent factors inducing a landslide: rainfall, thermal data and seismic events. This integration within GIS allows us to interpret information of displacements and to individualise correlations with above themes.

Many results were obtained about motion data relations with slope and rainfall data, not as many with temperature data. The study has also noted the influence of lithology. However, further on-site inspections and historical studies are required in order to interpret the significance of Point Target motion data correctly. This analysis type can be useful for large-scale monitoring and identification of those areas where local authorities must concentrate on future detailed studies and risk mitigation actions.

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Submitted: 27 Aug 2007
Revised: 14 Dec 2007
Accepted: 21 Feb 2008
Published: 22 Mar 2008
Responsible editor: Preben Gudmandsen

Losurdo A, S Pacifico, V Sarli, A Colangelo & M Leggeri, 2008. Integration of differential SAR interferometry and ancillary GIS data for the study of superficial deformations. EARSeL eProceedings, 7(1): 21-29


EARSeL European Association of Remote Sensing Laboratories, Strasbourg, France


BIS Library and Information System, Carl von Ossietzky University of Oldenburg


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