An improved accuracy evaluation method of urban ground subsidence monitoring in InSAR

doi:10.13474/j.cnki.11-2246.2019.0043

Abstract

Abstract:

Aiming at the singleness of the method which is to assess InSAR settlement monitoring accuracy, considering the problems of self-sedimentation of buildings and space-time benchmarks difficult to be unified, an improved inverse distance weights interpolation model is proposed. The experimental data are the PS-InSAR monitoring result of a subsidence area in Ningbo New City East, and the accuracy of the monitoring results is evaluated using the improved IDW interpolation model on the premise of a unified space-time reference, and the accuracy of the interpolation method is verified by a cross-validation method. Experiments show that the error of InSAR monitoring results obtained using the improved IDW interpolation is 0.3 and 0.8 by comparing two measured points. Compared to the normal IDW and Kriging methods, it is about 1.1 mm.

Key words: PS InSAR, improved IDW interpolation, cross-validation, accuracy evaluation

CLC Number:

P257

YANG Fan, WANG Daoshun, ZHANG Lei, ZHANG Ziwen. An improved accuracy evaluation method of urban ground subsidence monitoring in InSAR[J]. 测绘通报, 2019, 0(2): 54-57,85.

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