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Town Expansion and Driving Mechanism of Yimen County Based on High Spatial Resolution Classification

CHENGuoping1,2,LUOYanqing,LIYajun,OUYanghui,ZHANGWeihong,ZHANGXiaolun   

  1. 1.GeomaticsEngineeringFaculty,KunmingMetallurgyCollege,Kunming650033,China;
    2.FacultyofLandResourceEngineering,KunmingUniversityofScienceandTechnology,Kunming650093,China
  • Online:2017-12-19 Published:2017-12-19

Abstract: The combination of high score image and geographic information technology is one of the best means to achieve real-time and accurate monitoring of rapid urban expansion.Obtaining the basic data of urban expansion,analyzing the spatial differentiation characteristics of urban expansion and the structural characteristics of urban architecture,revealing the driving mechanism of urban expansion and making the government management make the right decision.The object-oriented classification technology is used to monitor the urban expansion of Yimen County from 2009 to 2013,and the monitoring results are analyzed with high score satellite imagery as the main data source.Theresults show that:(1)the best scale of Quick Bird image is 50,the shape factor is 0.6,the compactness factor is 0.7,the overall classification accuracy is 86%,and the Kappa coefficient is 77.7%,which can meet the research needs;(2)In the study area,the rate of change is38.26%,the expansion degree is 9.57%,the expansion intensity is0.02,and the extended comprehensive index is 0.61;(3)Through the gray relationalmodel,thedrivingforceofurbanexpansionis:Urbanizationlevel,nonagriculturalpopulation,industriallandarea,
thecorrelationvaluewere0.91,0.85 and 0.73.

Key words: urban expansion, driving force, gray correlation degree

CLC Number: