Landslide deformation monitoring using TLS technology and pseudo-single point monitoring model

doi:10.13474/j.cnki.11-2246.2021.0186

Abstract

Abstract: To overcome the limitations of traditional sparse points monitoring model unsuitable for TLS deformation measurement, and the deficiencies of the existing methods using TLS technology such as the one-dimensional characteristics and only available to the deformation analysis of regular geometry objects. This paper proposes a pseudo-single point monitoring model and a deformation computing approach based on TLS measurement, through constructing the generalized Gauss-Markov model to match and estimate the 3D deformation parameters of the selected pseudo-single point objects, full 3D deformation information can be get with high precision utilizing the high density of multi-period TLS data. It is especially suitable for the landslide field and other disaster monitoring. Finally, experimental results show that this method can achieve 1 cm deformation extraction accuracy when the scanning distance is about 240 m, which is of certain value in promoting the transformation of deformation monitoring from point mapping to shape mapping.

Key words: terrestrial laser scanning, deformation monitoring, landslide, pseudo-single point, matching estimation

CLC Number:

P258

GUO Xiantao, HUANG Teng, JIA Yan, ZHANG Rongchun. Landslide deformation monitoring using TLS technology and pseudo-single point monitoring model[J]. Bulletin of Surveying and Mapping, 2021, 0(6): 106-111.

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