Investigation of Landslides Caused by the 2011 Tohoku Earthquake Using Optical Satellite Images
Investigation of Landslides Caused by the 2011 Tohoku Earthquake Using Optical Satellite Images
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利用光学卫星图像调查 2011 年东北地震造成的山体滑坡
DOI：
10.13101/ijece.4.48
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
K. Nakagawa
中科院分区：
文献类型：
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作者：
Masaki Mizuno;Takumi Sato;S. Hayashi;M. Nishi;S. Katsura;K. Nakagawa
2011年3月日本东北地震后，国家土地和基础设施管理研究所对卫星图像进行了解释和处理，以确定地震造成的山体滑坡的分布情况。这项研究使用了ALOS AVNIR-2辐射计捕获的多光谱图像和日本宇宙航空研究开发机构提供的棱镜传感器的全色立体图像，以及来自Google Earth的沿海地区亚米地面分辨率的卫星图像。本研究的结论如下。这种应用需要来自光学卫星的高分辨率(小于1米)的大面积图像。利用卫星图像自动识别滑坡导致了一些错误识别。卫星图像的目视解译迅速揭示了大型滑坡的空间分布。获取最近的最低点图像并经常更新它们是至关重要的。
After the Tohoku (Japan) earthquake in March 2011, the National Institute for Land and Infrastructure Management interpreted and processed satellite images to determine the distribution of landslides caused by the earthquake. The study used multispectral images captured by the ALOS AVNIR-2 radiometer and panchromatic stereo images from the PRISM sensor provided by the Japan Aerospace Exploration Agency, along with satellite images with sub-meter ground resolution from Google Earth for coastal regions. The conclusions of this study are as follows. High-resolution (less than 1 m), large-area images from optical satellites were necessary for this sort of application. Automatic identification of landslides using satellite images led to some misidentifications. Visual interpretation of satellite images quickly revealed the spatial distribution of large-scale landslides. Acquiring recent nadir images and updating them frequently is essential.