A study on quick detection for earthquake roads damage in wide area applying the satellite image fusion analysis

当地震灾害范围较大时，需要快速检测道路的震害程度。为此，卫星图像分析对检测大面积受损道路是有效的。本文研究了光学传感器数据和合成孔径雷达数据的卫星图像分析方法在地震灾害检测中的应用，并以2004年日本楚渡地震为例进行了应用。实验结果表明，该方法对严重破损的道路具有较高的检测精度。基于所获得的道路损坏数字地图，开发了一个实用的道路紧急改造决策支持地理信息系统。

It is required to detect quickly the damages of roads induced by earthquake when the earthquake disaster extends in a wide area。For this purpose the satellite image analysis for the detection of the damaged roads in the wide area is effective。In this study satellite image analysis of the optical sensor data and synthetic aperture radar data for detection of earthquake disaster is developed and the proposed method is applied for the case of the 2004 Chuetu earthquake in Japan。It is found that the severely damaged roads are detected by the proposed method with high accuracy。Based on the obtained digital map of the damaged roads, a useful supporting GIS system for decision of emergency retrofit of the roads has been developed。