Object-Based Method for Estimating Tsunami-Induced Damage Using TerraSAR-X Data
Object-Based Method for Estimating Tsunami-Induced Damage Using TerraSAR-X Data
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DOI：
10.20965/jdr.2016.p0225
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发表时间：
2016-03-01
影响因子：
0.8
通讯作者：
Matsuoka, Masashi
中科院分区：
文献类型：
--
作者：
Gokon, Hideomi;Koshimura, Shunichi;Matsuoka, Masashi
我们开发的基于对象的方法用于估计建筑物损坏，使用来自 2011 年东北地震和海啸的高分辨率合成孔径雷达 (TerraSAR-X) 数据。我们开发的损害函数涉及事件前后 TerraSAR-X 数据的西格玛零值的变化与被冲毁建筑物的损害比率之间的关系。我们通过估计均匀区域中被冲毁的建筑物数量来确认该函数的性能符合预期，与皮尔逊 fs 相关系数 0.99 验证的地面实况数据非常吻合。在另一个测试地点应用相同的损伤函数得出的皮尔逊相关系数为 0.98。这些结果足以确保可转移性。然后，我们在 ArcGIS 环境中简化并半自动化了这些过程，在 26 分钟内估计了仙台市的建筑物损坏情况。
The object-based method we developed to estimate building damage uses high-resolution synthetic aperture radar (TerraSAR-X) data from the 2011 Tohoku earthquake and tsunami. The damage function we developed involves the relationship between changes in the sigma nought values of pre- and postevent TerraSAR-X data and the damage ratio of washed-away buildings. We confirmed that the function performed as expected by estimating the number of washed-away buildings in homogeneous areas, agreeing well with ground truth data verified by a Pearson fs correlation coefficient of 0.99. The same damage function applied at another test site yielded a Pearson's correlation coefficient of 0.98. These results are sufficient to ensure transferability. We then simplified and semiautomated these processes in an ArcGIS environment, estimating building damage in the city of Sendai within 26 minutes.