Application Of Remote Sensing Geological Interpretation Of GF-2 Data In Sikeshu Region, Xinjiang

In order to better understand the domestic satellite application in geological survey work,this paper chooses domestic GF-2 remote sensing satellite data,takes the Sikeshu area(located in the western region of southern margin of Junggar basin,Xinjiang)as the research object,and researches the remote sensing geological interpretation information enhancement method for the data in the dangerous region,based on the basis of remote sensing geological interpretation of research results at domestic and overseas.In this study,GF-2 remote sensing satellite data made in China was used as the main data,and Landsat-8remote sensing data was used as the auxiliary data,and the basic geological data of Sikeshu area were combined for remote sensing geological interpretation.At the same time,the field geological section measurement was carried out in the study area,and on this basis,the interpretation results of GF-2 remote sensing satellite were corrected.The main achievements are as follows:(1)Based on the preprocessing of GF-2 remote sensing image,the image information enhancement is carried out,mainly including band combination,contrast enhancement,multi-spectral image and panchromatic image fusion,principal component analysis,minimum noise separation,convolution filtering and other image information enhancement methods.After the pretreatment and image information enhancement of GF-2 image,the differences of geological units in the image are more obvious and the boundary is clearer.The fusion of 4 m spatial resolution multispectral image and 1 m spatial resolution panchromatic image of GF-2 remote sensing satellite data can obtain the fusion image of four tree areas with better resolution than 1 m,indicating that the domestic GF-2 data has a good application prospect in remote sensing geological interpretation of difficult areas.(2)According to OIF(Optimal Index Method),the band combination of GF-2 remote sensing image is analyzed,and the band combination with the largest value is the optimal band combination of GF-2 remote sensing image.By analyzing and comparing the Band combinations of Band 432,Band 431,Band 421 and Band 321 of GF-2 data,it is found that Band 321 has the best Band combination effect,and the image tone is relatively closer to the real color of the ground object,which is more favorable for visual interpretation.(3)Through the study of image fusion method,it is found that the spectral and texture information of GF-2 remote sensing image fused by Gram-Schmidt(spectral sharpening method)is enhanced,and the visual effect of Gram-Schmidt fusion image is the best.(4)Based on GF-2 remote sensing satellite images with enhanced information and combined with geological data,the lithology and structure remote sensing interpretation markers of Sikeshu area were established,and the lithology and structure of Sikeshu area were interpreted by combining with Landsat-8 data.Meanwhile,the interpretation results of remote sensing geology in Sikeshu area were verified,with the help of the field measured section.On this basis,the stratigraphic boundary of Sikeshu area was determined and the structural characteristics were analyzed.