Comparison between automated and manual mapping of typhoon‐triggered landslides from SPOT‐5 imagery
- 1 April 2007
- journal article
- research article
- Published by Taylor & Francis Ltd in International Journal of Remote Sensing
- Vol. 28 (8), 1843-1856
- https://doi.org/10.1080/01431160600935638
Abstract
Two large tropical cyclones struck Taiwan in the summer of 2004 and landslides triggered by these events caused not only casualties and housing damage but also produced large volumes of sediment that entered rivers and reservoirs. For reservoir and watershed management it is important to quickly identify the location and areal extent of new landslides for coordinating mitigation efforts. In this study, two automated methods, supervised and unsupervised classification of 10 m multi‐spectral SPOT‐5 imagery, were tested for their ability to identify and map landslide areas before and after the two storm events. A slope map was applied to mask roads, riverbeds and agricultural fields erroneously commissioned as landslides. The automated classification results were compared with manually delineated landslides using SPOT‐5 supermode satellite imagery with a resolution of 2.5 m. Statistical testing and spatial analysis of the mapping results were performed. Finally, the results from all three methods were validated by using 0.35 m orthophotographs. This paper reports the results and discusses the salient differences between the automated and manual methods.Keywords
This publication has 9 references indexed in Scilit:
- Best band combination for landslide studies in temperate environmentsInternational Journal of Remote Sensing, 2006
- Application of multi-temporal high-resolution imagery and GPS in a study of the motion of a canyon rim landslideISPRS Journal of Photogrammetry and Remote Sensing, 2005
- Remote sensing image thresholding methods for determining landslide activityInternational Journal of Remote Sensing, 2005
- Geomorphometric characteristics of New Zealand landslide damsEngineering Geology, 2004
- Earthquake-triggered increase in sediment delivery from an active mountain beltGeology, 2004
- Frequency and spatial distribution of landslides in a mountainous drainage basin: Western Foothills, TaiwanCATENA, 2002
- Landslide hazard assessment: summary review and new perspectivesBulletin of Engineering Geology and the Environment, 1999
- The Recognition of LandslidesPublished by Springer Science and Business Media LLC ,1999
- A simple definition of a landslideBulletin of Engineering Geology and the Environment, 1991