Analysis And Extraction Of Typical Characteristics Of Geographical Country Conditions Based On IDL

With the development of high-resolution remote sensing satellites,more and more high-resolution remote sensing images into people's lives.More and more high-resolution satellites bring more and more remote sensing images with high resolution,and these images are widely used in many industries such as national construction,land resources,forestry,environment and so on.At present,with the geography of national conditions census and monitoring project is advancing,the relevant remote sensing image of the typical characteristics of geographical conditions analysis and extraction work to play an increasingly important role.The extraction of typical elements of geographical conditions is one of the important contents of the extraction of geographic information.It has important practical significance and theoretical value.Based on this background,this paper first summarizes the characteristics of geography and national conditions(water features and road elements),and uses Yi Kang eCognition software to carry on the comprehensive characteristic analysis to the typical elements,And then the hierarchical strategy is compared with the experimental study.Finally,the extraction of typical elements of geographical conditions based on IDL is studied.In this paper,the study of hierarchical strategy extraction and IDL automation to extract the typical elements of geographical conditions on the one hand for the geographical conditions of the project provides a more optimized analysis and extraction system,on the other hand for high-resolution remote sensing image interpretation to provide the basis and technology guide.The paper mainly carries out the following research:(1)Geographic national conditions typical elements of the system.Based on the requirements of geography and national conditions,this paper summarizes the characteristic system of high resolution remote sensing image and the characteristic system covered by Yikang software,which lays the foundation for the analysis of the typical elements of geographical conditions,and has certain theoretical reference significance.(2)the characteristics of water and the typical elements of the road.Water elements and road elements as an important component of the geographical conditions of the four elements,their analysis is particularly important.In this paper,we use the model of statistical analysis of samples to analyze the typical characteristics of them,and obtain the ideal set of optimization features,which will play a role in the object-oriented interpretation of remote sensing images.(3)object-oriented hierarchical strategy research.Based on the results of the feature analysis of typical elements,this paper first designs the targeted hierarchical strategy,and then contrasts with the information extraction of the non-hierarchical remote sensing image,and obtains the advantages of good classification and highefficiency.The overall accuracy of the unstructured extraction is 0.72,and the overall accuracy of using the hierarchical strategy extraction can reach 0.81,and the classification result of the hierarchical strategy extraction is better.(4)Research on Extracting Typical Elements Based on IDL.This paper studies the characteristics of NDWI index based on water element and the characteristic rule set of road elements,and designs and program the extraction of typical elements of water and road.At the same time,the results show that the consistency ratio of water factor extraction is 92%,and the road element is the same as the result of the artificial interpretation of 100 water and road samples.The rate of coherence was 72%.IDL-based typical feature extraction method in the classification accuracy than the traditional classification extraction method has certain advantages,while the degree of automation is also higher.This paper summarizes the characteristics of high-resolution remote sensing images,and then analyzes the characteristics of the typical elements of geographical conditions,highlights the hierarchical strategy extraction model and IDL-based automated geographical conditions typical elements extraction method in remote sensing image interpretation In the advantages and roles.The research results obtained in this paper can be directly applied to the production projects of geographical conditions,and have certain practical application significance,but the research work needs to be further enhanced and deepened.