Rapid mapping of forested landslide from ultra-high resolution unmanned aerial vehicle data

R. Comert, U. Avdan, T. Gorum

Research output: Contribution to journalConference articlepeer-review

7 Citations (Scopus)

Abstract

The Black Sea Region is one of the most landslide prone area due to the high slope gradients, heavy rainfall and highly weathered hillslope material conditions in Turkey. The landslide occurrences in this region are mainly controlled by the hydro-climatic conditions and anthropogenic activities. Rapid regional landslide inventory mapping after a major event is main difficulties encountered in this densely vegetated region. However, landslide inventories are first step and necessary for susceptibility assessment since considering the principle that the past is the key to the future thus, future landslides will be more likely to occur under similar conditions, which have led to past and present instability. In this respect, it is important to apply rapid mapping techniques to create regional landslide inventory maps of the area. This study presents the preliminary results of the semi-automated mapping of landslides from unmanned aerial vehicles (UAV) with object-based image analysis (OBIA) approach. Within the scope of the study, ultra-high resolution aerial photographs were taken with fixed wing UAV system on Aug 17, 2017 in the landslide zones which are triggered by the prolonged heavy rainfall event on August 12-13, 2016 at Bartin Kurucaşile province. 10 cm resolution orthomosaic and Digital Surface Model (DSM) data of the area were produced by processing the obtained photographs. A test area was selected from the overall research area and semi-automatic landslide detection was performed by applying object-based image analysis. OBIA has been implemented in three steps: image segmentation, image object metric calculation and classification. The accuracy of the resulting maps is assessed by comparisons with expert based landslide inventory map of the area. As a result of the comparison, 80% of the 240 landslides in the area were detected correctly.

Original languageEnglish
Pages (from-to)171-176
Number of pages6
JournalInternational Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences - ISPRS Archives
Volume42
Issue number3W4
DOIs
Publication statusPublished - 6 Mar 2018
Externally publishedYes
Event2018 Geoinformation for Disaster Management Conference, Gi4DM 2018 - Istanbul, Turkey
Duration: 18 Mar 201821 Mar 2018

Bibliographical note

Publisher Copyright:
© Authors 2018. CC BY 4.0 License.

Funding

This study was supported by Anadolu University Scientific Research Projects Commission under the grant number 1608F607. The authors would like to thank İsmail Bulut from General Directorate of Combating Desertification and Erosion for his valuable suggestions on the site-selection.

FundersFunder number
Anadolu University Scientific Research Projects Commission1608F607

    Keywords

    • Bartin
    • Black Sea Region
    • Landslide
    • Object-based image analysis
    • Rapid mapping
    • UAV

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