IGARSS 2019 - 2019 IEEE International Geoscience and Remote Sensing Symposium | 2019
Two-Dimensional Displacement Analysis Of Buildings Based On Persistent Scatterer Clustering And Map Data
Abstract
In this paper, we propose a two-dimensional displacement analysis method with synthetic aperture radar images based on persistent scatterer (PS) clustering technique and map data for monitoring structures such as buildings in urban area. PS interferometry (PSI) technique measures millimetric displacement of ground and buildings, by employing stable reflection points called PSs obtained by a time-series analysis of synthetic aperture radar images. In order to extend PSI technique to two-dimensional displacement analysis, integration analysis of two displacements of individual structures are needed because positions of PSs vary with a line of sight (LOS). The proposed method calculates displacements of structures by PS clustering, which separates PSs into point clusters corresponding to structures. Each PS cluster is automatically matched to appropriate structures by using map data. One-dimensional displacements of PS clusters along two different LOSs are integrated to a two-dimensional displacement of each structure. Analysis results demonstrate that the proposed method is effective for understanding two-dimensional displacements of individual structures.