Research On The Lithology Application Of GF-1 Satellite Data

In recent years,with the successful launch of numerous domestic high-spatial resolution satellites such as ZY-1 02 C,ZY-3,and GF-1,the promotion and application of image data has gradually extended to the geological field.Based on the“Domestic business satellite remote sensing geological information product development and services”project,the paper selected a representative domestic remote sensing data—GF-1 satellite data.Based on image preprocessing and image enhancement processing,the study of lithologic application in the Baigan Lake area of Hami was carried out..In addition,the domestic GF-1 satellite data and the French SPOT5 satellite data have nearly the same spatial resolution and spectral resolution.Using these two kinds of data to perform lithological comparative interpretation of the study area,the application effect of GF-1 satellite data can be evaluated.The research results show that the GF-1 satellite data has a good lithologic application effect,and has certain practical significance for the popularization and application of GF-1satellite data.The research results obtained in the dissertation are as follows:(1)According to the characteristics of GF-1 satellite data,we introduce an image processing software PIE with strong pertinence to domestic satellite data and comprehensively use software advantages such as ENVI and ERDAS to summarize a pre-processing process for GF-1 data.,the process is convenient and fast,but also saves time and effort.(2)The results of the GF-1 satellite data image enhancement processing show that the best band combination of GF-1 data is band432.The principal component analysis and color space transformation have even more enhanced lithologic information in GF-1 data.With obvious advantages,the NNDiffuse fusion method has strong comprehensive performance in GF-1 data fusion processing.(3)The GF-1 satellite data was used to fully interpret the exposed lithologic and stratigraphic units in the study area.The three major rock types include sedimentary rocks,magmatic rocks,and metamorphic rocks.The field verification results show that the overall interpretation accuracy of the GF-1 data research area can reach82.05%.The GF-1 data can fully identify the lithology of 1:50000 geological maps,and can subdivide the lithology to a certain extent.The identification of geological boundaries is also more accurate.The interpretation Of Quaternary,sedimentary and magmatic rocks is good,but the recognition of metamorphic rocks and veins is poor.(4)Using the GF-1 and SPOT5 satellite data,the comprehensive interpretation of lithologic information of various geological bodies in the study area was carried out.The research results show that the GF-1 and SPOT5 satellite data have basically the same recognition effect on the lithologic boundary of the study area.The difference between the two data is that the true color image of GF-1 data is favorable for geologists to directly read lithological information through imagery,while SPOT5 data does not have true color image;SPOT5 data has a short-wave infrared band,so that the identification of rocks in lithologic complex areas is significantly better than that of GF-1 data.