A Comparative Study Of Linear Structure Extraction Based On GF-1 And Landsat-8 Remote Sensing Images

With the development of science and technology,the world has a variety of earth observation satellite platforms based on different purpose,this provides more and more abundant remote sensing image data for scientific research and social development,at the same time,with the advent of new sensors,the spatial resolution of images has been effectively improved,this make the details of the surface of earth,the texture features?structural forms and the relationship with adjacent object of object be presented better.As a large number of tectonic element on the surface of earth,lineament can describe the tectonic pattern of a region from different sides.Extracting it through multi-source and multi-scale data will provide more comprehensive and abundant geological information for people's research work.Analyzing and studying it,and exploring the geological significance of expression can provide new ideas and methods for regional structure analysis and geological survey by remote sensing technology in the future.In this study,GF-1 image and Landsat-8 image were used as remote sensing data,and the lineament extracted from the two images respectively was analyzed on the basis of previous studies.The lineament information feature extracted from the images based on different spatial resolutions were studied,to make comprehensive analysis finally,then the following research results have been achieved.(1)After quantitative analysis of the lineament extracted from GF-1 and Landsat-8 images,it is found that the lineament extracted from two images is mainly the orientation of NE and EW;However,There's a big difference in the aspect of central symmetry?length and distribution of lineament between them.(2)The lineament information extracted from GF-1 and Landsat-8 image based on 15m?30m spatial resolution was compared,the result shows that there is no significant difference in the distribution of the study area and the mean length of the lineament in the two images.(3)The lineament feature that extracted from GF-1 or Landsat-8 image under the influence of different spatial resolutions were analyzed,the result shows that the distribution of lineament extracted are different in the study area;in the aspect of the average length of lineament,the lower the spatial resolution is,the longer the average length is.(4)After the factor analysis of all the lineament information interpreted,it is found that the lineament extracted under the medium and the low resolution level mainly distributes in the karst landform area in the southwest of the study area,which has a certain degree of geomorphologic significance;and the linear structures extracted under the high resolution level mainly distribute linearly along the fault F1 in the study area,which has a certain degree of tectonic significance.