The Taiwan area of mostly rugged mountains and special geological conditions induced the catastrophic slope deformation by heavy rainfall and earthquakes. Especially, refer to those buildings of unstable hillslopes are significant problem because it affects the living safety. In this article, discuss mainly region base on buildings in wide hillslope, and proposes a set of hierarchical monitoring procedure. First, Persistent Scatters Interferometric Synthetic Aperture Radar (PS-InSAR) technology observes a wide region of displacement by SAR images, hence detects result of severe displacement regions as the interested areas. Furthermore, utilizing Multi-rotors UAV (MUAV) captures high-resolution images calculation deformation in the interested areas, which evaluates the serious displacement as a high-risk region. Finally, the self-develop surveillance cameras monitoring system achieves real-time displacement and behavior in the high-risk regions.
The study area is located in the campus. From the hierarchical monitoring procedure results, the PS-InSAR investigated in large region is reliable and reasonable which can provide MUAV flight area effective reference. Both the PS-InSAR and MUAV shown the ground maximum displacement of 30 mm/yr (LOS velocity) in the interested areas which ground displacement is more than building. The advantages of surveillance cameras obtain real-time displacement, it can provide clear surface erosion behavior. We have experimentally demonstrated through three remote sensing techniques, it provides a reliable hierarchical monitoring procedure and deformation information of different scales.