Matching Persistent Scatterers to optical oblique images

Persistent Scatterer Interferometry is a well established method for subsidence monitoring of buildings especially in urban areas. Even though the very high resolution of current SAR missions allow for ground resolutions of some decimeters, the assignment of Persistent Scatterers to single parts of buildings is not well investigated yet. We present a new approach how to incorporate optical oblique imagery to assign Persistent Scatterers to their presumed correspondences in the optical data in order to establish a link between Persistent Scatterers and single structures of buildings. This is a crucial step for advanced subsidence monitoring in urban ares. The centerpiece of the presented work is a measure which quantifies the quality of the bipartite matching between single Persistent Scatterers and their correspondences at a regular lattice in the optical data. The applicability of our approach is presented in two exemplary case studies.