The Applications Of Office Information Extraction Based On Remote Sensing Techniques In The Third Land Survey

With the continuous update and development of remote sensing technology,in view of the advantages of remote sensing technology such as high timeliness of acquiring ground data,less restrictions by the ground,and large amount of acquiring information data,it has received much attention and developed rapidly in recent years.The method of information extraction using remote sensing data for image interpretation is also gradually applied in land survey.With the improvement of spatial variability and the shortening of temporal resolution of remote sensing images,the spectral features presented by remote sensing images become more and more abundant,and the surface contents and specific details also have a good performance.Remote sensing images of the latest time phase can be used to extract information by manual interpretation or automatic classification,which can reflect the ground object information in the most timely,direct and objective manner and monitor the change of land use.Based on the third national land survey,on the basis of the second national land survey,the third national land survey comprehensively improved and refined the results of the second national land survey by combining new technologies and new methods,so as to ensure the high accuracy of land use data.Combined with the task of the third national land survey,and supported by remote sensing technology,this paper carried out an applied research on the extraction of industry information of the third national land survey.The main results are as follows:Firstly,the principle and method of image production and information extraction application are introduced,mainly including the imaging principle of gaofen-2 remote sensing image,the principle applied in the key steps of image production,the image processing method and the method of remote sensing image information extraction application.According to the selected image data of the experimental area,the image processing and the internal industry information extraction were carried out.According to the technical process and corresponding indicators,the remote sensing image data were processed.According to the technical indicators,the internal industry information was extracted through the man-machine interaction mode.The Extract results as class A of the whole district was collected by means of human-computer interaction,according to the requirement and norm of internal information extraction.The results of the internal information extracted from the test area are summarized and obtained by filling in the relevant attribute information and data.A total of 23,646 Class A patches were extracted,totaling 170,927.8 Mu.The main types of extraction were 01,03,JZ,20,and DT.The current situation of land use in the district and county was revealed,including the spatial distribution and area of various land types.Through the comparison and analysis with the original database,the current land use direction can be found,and the investigation clues and investigation targets can be provided for the three surveys.The obtained results prove that the application of remote sensing technology for the extraction of industry information is more conducive to the efficient local land survey and land online evidence,providing a guarantee for the comprehensive promotion of the third national land survey.