Abstract:The rapid assessment of the construction of seismic disaster information has a guiding meaning for earthquake emergency rescue work, and the polarimetric synthetic aperture radar (SAR) has the characteristics of all climatic conditions and of all times. Therefore, the extraction of seismic disaster information from polarimetric SAR images gradually became an access point for research. Although the polarimetric SAR has abundant polarimetric information, the texture information cannot be overlooked. In the image, the texture distribution of the intact artificial construction is regular and that of the collapsed construction area is disorderly. Therefore, the combination of texture information can also extract construction information well. In this article, the 2010 fully polarimetric SAR data in the Yushu area were taken as the object of research. First, the construction area and non-building information, such as the road and hydraulic system, were extracted from the SAR images. On this basis, the variation calculation was performed in the area of collapsed construction and intact building in component T11 of the coherent dispersion matrix. After determining the variation interval a according to the variation curve, the variogram texture information was obtained. Finally, the FCM algorithm was used to extract the area of the intact building and the collapsed building collected from the texture variation information, respectively. The extraction accuracy of intact buildings, destroyed buildings and water systems on the roads is 80.18%, 84.54% and 77.58%, respectively, which are verified by the corresponding sample pixels of the optical remote sensing images after the earthquake.