ANALYSIS OF LANDSLIDES BASED ON DISPLACEMENTS OF LINES
| Autor: | C. Colomo-Jiménez, J. L. Pérez-García, J. M. Gómez-López, T. Fernández-del Castillo, A. T. Mozas-Calvache |
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| Rok vydání: | 2016 |
| Předmět: |
lcsh:Applied optics. Photonics
010504 meteorology & atmospheric sciences lcsh:T 0211 other engineering and technologies lcsh:TA1501-1820 High resolution Landslide Terrain 02 engineering and technology lcsh:Technology 01 natural sciences Stability (probability) Moment (mathematics) Photogrammetry Geography lcsh:TA1-2040 lcsh:Engineering (General). Civil engineering (General) Control methods 021101 geological & geomatics engineering 0105 earth and related environmental sciences Remote sensing |
| Zdroj: | The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XLI-B7, Pp 549-555 (2016) |
| ISSN: | 2194-9034 |
| DOI: | 10.5194/isprs-archives-xli-b7-549-2016 |
| Popis: | Nowadays, the development of UAS has allowed the obtaining of high resolution and accurate cartographic products, such as DSMs and orthoimages. These products can be used in studies of the evolution of landslides. The stability of slopes is a main issue because, among others, it can suppose a serious risk to infrastructures. Until this moment, some studies for analysing slope movements have been carried out using the comparison of positions of well-defined points or comparing two surfaces obtained from two DSMs. In this paper we present a methodology for analysing landslides based on some linear elements located on the terrain. More specifically, we analyse some lines of road sections which are located on an unstable slope, checking the movements of the landslide and their effect on the infrastructure. The methodology includes the obtaining of high resolution orthoimages and DSMs which correspond to two or more epochs of the same landslide, the 3D digitizing of common linear elements, and the computing of the displacements of matched lines (from two epochs) using positional control methods based on lines. The proposed methodology has been tested using two DSMs and two orthoimages (corresponding to two epochs) obtained from two photogrammetric projects developed with an UAS. This real case was applied to an unstable slope with landslides which affected several sections of a road. The results have demonstrated the viability of the proposed methodology in analysing the behaviour of the landslide and more specifically, the effects on these infrastructures. |
| Databáze: | OpenAIRE |
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