Abstract
Persistent Scatterer Interferometry (PSI) is a powerful radar-based remote sensing technique, able to monitor small displacements by analyzing a temporal stack of coherent synthetic aperture radar images. In an urban environment it is desirable to link the resulting PS points to single buildings and their substructures to allow an integration into building information and monitoring systems. We propose a distance metric that, combined with a dimension reduction, allows a clustering of PS points into local structures which follow a similar deformation behavior over time. Our experiments show that we can extract plausible substructures and their deformation histories on medium sized and large buildings. We present the results of this workflow on a relatively small residential house. Additionally we demonstrate a much larger building with several hundred PS points and dozens of resulting clusters in a web-base platform that allows the investigation of the results in three dimensions.
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