Improving Landslide Detection on SAR Data through Deep Learning

• URL: http://arxiv.org/abs/2105.00782v1
• Date: Mon, 3 May 2021 12:37:57 GMT
• Title: Improving Landslide Detection on SAR Data through Deep Learning
• Authors: Lorenzo Nava, Oriol Monserrat and Filippo Catani
• Abstract summary: We use deep-learning convolution neural networks (CNNs) to assess the landslide mapping and classification performances on optical images. We analyzed the conditions before and after an earthquake that triggered about 8000 coseismic landslides. CNNs based on the combination of ground range detected (GRD) SAR data reached overall accuracies beyond 94%.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In this letter, we use deep-learning convolution neural networks (CNNs) to assess the landslide mapping and classification performances on optical images (from Sentinel-2) and SAR images (from Sentinel-1). The training and test zones used to independently evaluate the performance of the CNNs on different datasets are located in the eastern Iburi subprefecture in Hokkaido, where, at 03.08 local time (JST) on September 6, 2018, an Mw 6.6 earthquake triggered about 8000 coseismic landslides. We analyzed the conditions before and after the earthquake exploiting multi-polarization SAR as well as optical data by means of a CNN implemented in TensorFlow that points out the locations where the Landslide class is predicted as more likely. As expected, the CNN run on optical images proved itself excellent for the landslide detection task, achieving an overall accuracy of 99.20% while CNNs based on the combination of ground range detected (GRD) SAR data reached overall accuracies beyond 94%. Our findings show that the integrated use of SAR data may also allow for rapid mapping even during storms and under dense cloud cover and seems to provide comparable accuracy to classical optical change detection in landslide recognition and mapping.

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