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The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B7. Beijing 2008 
Figure 6. Subsidence velocity map in 2003-2005 
Figure 7. The Leveling Benchmarks surveyed in 2003-2005 
Nearest Neighboring Comparison(PS) 
Subsidence Velocity (mm/yr) 
Figure 8. The comparison between LBs and PSs by nearest neighboring method to validate the PS technique 
Subsidence Velocity (mm/yr) 
15 
Nearest Neighboring Comparison(STUN) 
c ^ ^ A 1 ^°° 
-•—PSs 
LBs 
Errors 
Figure 9. The comparison between LBs and PSs by nearest neighboring method to validate the STUN technique