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Comparing Manual and Semi-Automated Landslide Mapping Based on Optical Satellite Images from Different Sensors
AuthorHölbling, Daniel ; Eisank, Clemens ; Albrecht, Florian ; Vecchiotti, Filippo ; Friedl, Barbara ; Weinke, Elisabeth ; Kociu, Arben
Published in
Geosciences, Basel, 2017, Vol. 7, Issue 37, page 1-20
PublishedMDPI, 2017
Document typeJournal Article
Keywords (DE)Hangrutschungen / Fernerkundung / Objekt-basiert Bildanalyse / Teil-automatisiertes Kartieren / Manuelles Kartieren / Visuelle Interpretation / Räumliche Genauigkeitsmaße / Optische Satellitenbilder / Alpen
Keywords (EN)Landslides / Remote Sensing / Object-based Image Analysis (OBIA) / Semi-automated Mapping / Manual Mapping / Visual Interpretation / Spatial Accuracy Metrics / Optical Satellite Images / Alps
URNurn:nbn:at:at-ubs:3-4462 Persistent Identifier (URN)
 The work is publicly available
Comparing Manual and Semi-Automated Landslide Mapping Based on Optical Satellite Images from Different Sensors [16.83 mb]
Abstract (English)

Object-based image analysis (OBIA) has been increasingly used to map geohazards such as landslides on optical satellite images. OBIA shows various advantages over traditional image analysis methods due to its potential for considering various properties of segmentation-derived image objects (spectral, spatial, contextual, and textural) for classification. For accurately identifying and mapping landslides, however, visual image interpretation is still the most widely used method. The major question therefore is if semi-automated methods such as OBIA can achieve results of comparable quality in contrast to visual image interpretation. In this paper we apply OBIA for detecting and delineating landslides in five selected study areas in Austria and Italy using optical Earth Observation (EO) data from different sensors (Landsat 7, SPOT-5, WorldView-2/3, and Sentinel-2) and compare the OBIA mapping results to outcomes from visual image interpretation. A detailed evaluation of the mapping results per study area and sensor is performed by a number of spatial accuracy metrics, and the advantages and disadvantages of the two approaches for landslide mapping on optical EO data are discussed. The analyses show that both methods produce similar results, whereby the achieved accuracy values vary between the study areas.

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