Geological interpretation of remote sensing images based on data fusion of GF2 and landsat 8——A case study of the Wafangdian 1∶50000 quadrangle map
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    Abstract:

    As the increasing resolution of remote sensing satellites,the application of remote sensing technology in geological mapping is becoming more and more extensive. The application of remote sensing in geology still has many shortcomings,but for geological mapping work can greatly save the numbers of field work. Remote sensing geological interpretation can distinguish geological bodies with large differences in lithology, and draw their boundaries, reduce unnecessary field investigations, and focus the geologists on more complex geosciences. GF2 satellite's panchromatic band is 0.8 m which belong to higher resolution satellite. In particular ,it has been favoured by geologist because of its date accuracy, convenient acquisition and a short period of return visit. At present, there are relatively few documents on remote sensing geological interpretation using GF2 satellite. This paper has certain demonstration effects.Take the city of Wafangdian in 1∶50000 standard map for instance. Using GF2 satellite remote sensing data in geological unit interpretation and linear structure interpretation and other aspects of work . Using GF2 data and Landsat8 data fusion and principal component analysis to make false color synthetic images. A comprehensive comparative analysis is made of the direct interpretation marks and the indirect interpretation marks, 21 geologic units and 61 linear fault structures were reconstructed. The true color synthesis and DEM superposition were used to establish the surface 3D model to determine the fracture period. Cross- cutting relationship, and finally compare the results of remote sensing geological interpretation with the results of field field investigations, to analyze the accuracy of geological interpretation, and the average agreement rate between the two is 80%,reaching the requirement of 1∶50000 regional geological adjustment. Provide reference basis for the investigative work of Wafangdian 1∶50000 areal geology. Fill in the blank of remote sensing image features of the geological unit in the Wafangdian area.

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WANG Xuan, WANG Haipeng, WANG Ran, WU Zijie, GAO Fuliang, KANG Ning, WAN Fanglai, WANG Yilong, YANG Huan, LIU Jie.2019. Geological interpretation of remote sensing images based on data fusion of GF2 and landsat 8——A case study of the Wafangdian 1∶50000 quadrangle map[J]. Geological Review,65(4):918-928.

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History
  • Received:August 27,2018
  • Revised:April 27,2019
  • Adopted:
  • Online: July 17,2019
  • Published: