3. Subway development in Shanghai From 2010 to 2020: 5 extensions , 8 new lines Totally there will be more than 20 lines
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5. Previous subsidence studies in Shanghai D. Perissin and T. Wang,Time-Series InSAR Applications Over Urban Areas in China, IEEE J-STARS, 4(1):92 – 100, 2010 (a) PS technique (1993 – 2000) (b) optical leveling (1990-1998) ESA, 40 ERS data images
6. New data availability in Shanghai: Cosmo-SkyMed 33 high resolution/frequency X-band SAR images
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8. Processing tool used in this study: SARPROZ http://ihome.cuhk.edu.hk/~b122066/index_files/download.htm Written in Matlab, graphical interface, advanced options, processing, data visual./export.
9. Results and analysis Shanghai Huang Pu, Lu Wan, Jing An and Zha Bei, 600 sqkm ~1.5 Million PS’s
10. Results and analysis Close up of subsidence map and superposition of Metro stations
11. Deformation detail – localization The precise location of the subway tunnels is not public . With radar data, through the surface deformation, we can precisely track the new lines built recently.
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13. Example of 3D visualization. The color indicates the PS Height
14. Example of 3D visualization. The color indicates the PS Height
15. Deformation detail – Xiaonanmen Subsidence happens mostly on the ground or on low buildings Near Xiaonanmen station – line 9 High buildings Metro tunnel SARPROZ visualization tool
