Extraction of damaged buildings due to the 2011 Tohoku, Japan earthquake tsunami

Wen Liu, Fumio Yamazaki, Hideomi Gokon, Shunichi Koshimura

    Research output: Contribution to conferencePaperpeer-review

    9 Citations (Scopus)

    Abstract

    The 11 March 2011 Tohoku, Japan earthquake caused gigantic tsunamis and widespread devastations. Various satellites quickly captured the details of affected areas, and were used for emergency response. In this study, high-resolution pre- and post-event TerraSAR-X (TSX) intensity images were used to identify damaged buildings. Since the damaged buildings show changes in backscattering intensity, they can be detected by calculating the difference. A GIS map was introduced to identify individual damaged buildings and investigate their characteristics. According to the side-looking nature of SAR sensors, the buildings' shapes obtained from the GIS map were converted to match their locations in the TSX images. Then washed-away and damaged buildings were extracted using the changed area of SAR intensity within a building's wall and outline. The results were compared with visual interpretation results, and the accuracy of the proposed method was confirmed.

    Original languageEnglish
    Pages4038-4041
    Number of pages4
    DOIs
    Publication statusPublished - 2012
    Event2012 32nd IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2012 - Munich, Germany
    Duration: 2012 Jul 222012 Jul 27

    Other

    Other2012 32nd IEEE International Geoscience and Remote Sensing Symposium, IGARSS 2012
    Country/TerritoryGermany
    CityMunich
    Period12/7/2212/7/27

    Keywords

    • buildings
    • feature extraction
    • loss measurement
    • radar
    • tsunami

    ASJC Scopus subject areas

    • Computer Science Applications
    • Earth and Planetary Sciences(all)

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