Research On Urban Expansion Change And Driving Force Based On Image Classification

With the continuous development of economic construction and the increase of population,the contradiction between population and land use becomes more and more prominent While rapid urban development can lead to economic growth,but also affect the city’s land use situation.Therefore,the study of urban expansion and changes in the driving force of the relevant departments of urban science and the establishment of urban development planning has an important role and significance.In recent years,remote sensing technology and electronic technology have been rapid development.To remote sensing image as an analysis of the basis of urban expansion to become the future development trend.It can be in a short period of time to accurately find the land use changes.It can provide a strong basis for the study of the late urban expansion and change,and improve the credibility of the research results.In this paper,the Yimen County urban area as the research object,combined with the economic development data of Yimen County in recent years,The gray relational model is established,and the change and driving force of Yimen County are analyzed comprehensively.The main research results are:(1)Based on the image data of Yimen County in 2009 and 2013,the image data of two phases were classified by object-oriented method.The results of classification accuracy indicate that the results of classification meet the needs of urban land change detection.Finally,through the extraction of the area of Yimen County,the urban area of 2009 and 2013 is compared with each other in order to realize the experiment and research on the expansion and change of Yimen County.(2)Combined with ArcGIS software,extended the expansion of Yimen County in terms of expansion speed and strength of urban expansion and change were analyzed.(3)In this paper,we introduce the gray relational grade model,and use the classification results,combined with the economic data of Yimen County in recent years,and analyze the correlation coefficient between urban expansion and driving factors in Yimen County to determine the main influencing factors.The study shows that the important reason for the rapid expansion of Yimen County is the increase of urbanization level and the number of non-agricultural population in Yimen county.