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Potential and Limitation of SPOT-5 Ortho-Image Correlation to Investigate the Cinematics of Landslides: The Example of "Mare a Poule d'Eau" (Reunion, France) ArchiMer
Le Bivic, Rejanne; Allemand, Pascal; Quiquerez, Amelie; Delacourt, Christophe.
Over the last 10 years, the accessibility of high spatial resolution remote sensing images has strongly increased. These images are available in ortho-rectified format which do not necessitate any further geometrical processing to be analyzed. In parallel, image correlation software has become more efficient and friendly. In this paper, image correlation methods are tested to evaluate their potential and limitations to measure the surface displacements in a complex case of a landslide located in a tropical environment. This studied landslide, called "Mare a Poule d'Eau", is located in the Salazie erosion watershed in Reunion Island (France). This landslide is monitored daily by a DGPS station which registers the south-north displacements. Two pairs of...
Tipo: Text Palavras-chave: SPOT-5; Image correlation; Landslide; Reunion Island.
Ano: 2017 URL: https://archimer.ifremer.fr/doc/00638/75042/75670.pdf
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TOWARDS TIME-SERIES PROCESSING OF VHR SATELLITE IMAGES FOR SURFACE DEFORMATION DETECTON AND MEASUREMENTS ArchiMer
Stumpf, A.; Delacourt, Christophe; Malet, J. P..
The increasing fleet of VHR optical satellites (e.g. Pleiades, Spot 6/7, WorldView-3) offers new opportunities for the monitoring of surface deformation resulting from gravitational (e.g. glaciers, landslides) or tectonic forces (coseismic slip). Image correlation techniques have been developed and successfully employed in many geoscientific studies to quantify horizontal surface deformation at sub-pixel precision. The analysis of time-series, however, has received less attention in this context and there is still a lack of techniques that fully exploit archived image time-series and the increasing flux of incoming data. This study targets the development of an image correlation processing chain that relies on multiple pair-wise matching to exploit the...
Tipo: Text Palavras-chave: Deformation measurement; Image correlation; High-performance computing; Satellite remote sensing.
Ano: 2015 URL: https://archimer.ifremer.fr/doc/00639/75146/75512.pdf
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