Validating Assessments of Seismic Damage Made from Remote Sensing
Validating Assessments of Seismic Damage Made from Remote Sensing
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DOI：
10.1193/1.3632109
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发表时间：
2011-10
影响因子：
5
通讯作者：
E. Booth;Keiko Saito;R. Spence;G. Madabhushi;R. Eguchi
中科院分区：
文献类型：
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作者：
E. Booth;Keiko Saito;R. Spence;G. Madabhushi;R. Eguchi
通过比较三个数据集，验证了2010年海地地震后的损失评估。第一个是对107 000座建筑物使用空间分辨率为15-25厘米的垂直航空图像。第二次对1 241座建筑物使用了Pictometry图像（由飞机从四个方向拍摄的分辨率约为10厘米的斜角照片）。第三个数据集，142个建筑物，使用地面观测。地面观测证实，遥感往往低估了严重受损和倒塌的建筑物的比例，而且难以对中度或低度受损情况进行遥感评估。使用了贝叶斯统计数据和根据图像测量法图像和地面观测进行的抽样调查，以改进根据垂直图像进行的远距离损害评估。讨论了制定标准系数以纠正远距离评估的可能性。实地演习表明，需要制定一套国际商定的、适合灾后需求评估和其他用途的损害定义。
Assessments of damage following the 2010 Haitian earthquake were validated by comparing three datasets. The first, for 107,000 buildings, used vertical aerial images with a 15–25 cm spatial resolution. The second, for 1,241 buildings, used Pictometry images (oblique angle shots with a resolution of about 10 cm taken in four directions by aircraft). The third dataset, for 142 buildings, used ground observations. The ground observations confirmed the tendency of remote sensing to underestimate the proportion of heavily damaged and collapsed buildings, and the difficulty of making remote assessments of moderate or low damage. Bayesian statistics and sample surveys made from Pictometry images and ground observations were used to improve remote damage assessments from vertical images. The possibility of developing standard factors to correct remote assessments is discussed. The field exercise pointed to the need to produce an internationally agreed-upon set of damage definitions, suitable for postdisaster needs assessments as well as for other uses.