Detection of ground subsidence in the city of Lisbon: Comparison of InSAR and topographic measurements

Author

Catalao, Joao ; Nico, Giovanni ; Conde, Vasco

Author_Institution

Inst. D. Luiz, Univ. de Lisboa, Lisboa, Portugal

fYear

2011

fDate

11-13 April 2011

Firstpage

417

Lastpage

420

Abstract

In this work we present the results of an experiment aiming to measure a ground subsidence in the city of Lisbon, Portugal, possibly related to works for the building of the city´s subway infrastructure. A time series of 46 ERS SAR images, acquired between May 1995 and January 2001, is interferometrically processed using the Persistent Scatterers (PS) technique and terrain deformation velocities estimated at the location of PS. The interferometric SAR (InSAR) estimates are compared to topographic measurements of terrain subsidence carried out in 1976, 1996 and 2010.

Keywords

radar interferometry; synthetic aperture radar; terrain mapping; time series; topography (Earth); AD 1995 05 to 2001 01; ERS SAR image; InSAR measurement; Lisbon city; Portugal; ground subsidence detection; interferometric SAR estimation; persistent scatterer technique; terrain deformation velocity estimation; time series; topographic measurement; Area measurement; Buildings; Cities and towns; Correlation; Remote sensing; Spatial resolution; Urban areas;

fLanguage

English

Publisher

ieee

Conference_Titel

Urban Remote Sensing Event (JURSE), 2011 Joint

Conference_Location

Munich

Print_ISBN

978-1-4244-8658-8

Type

conf

DOI

10.1109/JURSE.2011.5764808

Filename

5764808