Multi-source data fusion based on ensemble learning for rapid building damage mapping during the 2018 Sulawesi earthquake and Tsunami in Palu, Indonesia

Bruno Adriano, Junshi Xia, Gerald Baier, Naoto Yokoya, Shunichi Koshimura

    Research output: Contribution to journalArticlepeer-review

    24 Citations (Scopus)

    Abstract

    This work presents a detailed analysis of building damage recognition, employing multi-source data fusion and ensemble learning algorithms for rapid damage mapping tasks. A damage classification framework is introduced and tested to categorize the building damage following the recent 2018 Sulawesi earthquake and tsunami. Three robust ensemble learning classifiers were investigated for recognizing building damage from Synthetic Aperture Radar (SAR) and optical remote sensing datasets and their derived features. The contribution of each feature dataset was also explored, considering different combinations of sensors as well as their temporal information. SAR scenes acquired by the ALOS-2 PALSAR-2 and Sentinel-1 sensors were used. The optical Sentinel-2 and PlanetScope sensors were also included in this study. A non-local filter in the preprocessing phase was used to enhance the SAR features. Our results demonstrated that the canonical correlation forests classifier performs better in comparison to the other classifiers. In the data fusion analysis, Digital Elevation Model (DEM)- and SAR-derived features contributed the most in the overall damage classification. Our proposed mapping framework successfully classifies four levels of building damage (with overall accuracy > 90%, average accuracy > 67%). The proposed framework learned the damage patterns from a limited available human-interpreted building damage annotation and expands this information to map a larger affected area. This process including preand post-processing phases were completed in about 3 h after acquiring all raw datasets.

    Original languageEnglish
    Article number886
    JournalRemote Sensing
    Volume11
    Issue number7
    DOIs
    Publication statusPublished - 2019 Apr 1

    Keywords

    • 2018 Sulawesi earthquake-tsunami
    • Ensemble learning classifier
    • Rapid building damage mapping

    ASJC Scopus subject areas

    • Earth and Planetary Sciences(all)

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