Urban Spatial Expansion Of Agglomerate Perspective In Kunming & Yvxi

Yunnan urban agglomeration in the middle distance in kunming and yuxi city is the nearest. In recent years the development of the urban space changes significantly. Because of its special economy, geography and traffic location, the urban population and urbanization has increased dramatically in recent years. As the city scale increasing, the land increasingly prominent contradictions and social and environmental problems. Their changes of urban spatial extension typical in the province and even in China. The study of extension characteristics, driving mechanism and dynamic simulation prediction have good to guiding the rational layout of urban space, the effective development and utilization of land resources and management, ecological environment protection and management. And for KunYu city development and improvement to provide important basis for the establishment of policy.(1) To four phase image interpretation, supervised classification and accuracy of the inspection. Remote sensing interpretation precision in 2000-2015 were 88.4590%, 92.2785%,90.0047% and 88.4590% respectively. Kappa test value of 0.7963,0.7953, 0.7426 and 0.9566 respectively. Land use can be divided into the waters, the urban construction land, grassland, cultivated land, forest land and unused land.(2) Using index method and dynamic analysis method based on pixels, and studied the dynamic pattern of the characteristics of urban spatial extension. The results showed: ① Cultivated land is the most important contributor to urban construction land growth. ② All land types into decreasing the amount of construction land. Transformation type is the most prominent land, construction land and unused land, construction land and forest land, land for construction purposes. Spatially concentrated in dianchi lake northeast, southeast, j inning county, kunming city center periphery, long yuxi city center and the surrounding water to the airport. ③The urban space performance was born into a first (Creation) gather (Aggregation) after the change process. City plaques after first growth alone on a new site dot expansion, eventually fill into large patch process. Urban space is not intensive in the study area, using the discrete space, form a complex. ④ Clearance degree and trend surface analysis, according to the results of KunYu weakened urban spatial extension of centricity, appear homogenization phenomenon of regional development. Expand trend projection "tentacles" by the peace of the west side of dianchi lake to kunming chenggong southeast direction direction, after constantly stretching, transferred to KunYu cohesion between regions. Kun, yu appeared in the period from 2000 to 2015 on the space development trend of integration.(3) Quantity scale characteristics, according to the results of the study area from 2000 to 2015, the urban spatial expansion speed strength characteristics of the indicators show the declining trend. In 2000-2005, extension type characterized by high speed, fast. 2005-2010, the speed of urban spatial extension strength than the first-order fell by about 30%, extension type for medium speed. In 2010-2015 extension type for low speed, slowly.(4) Driven by correlation discriminant factor and the correlation of urban spatial extension, Cramer V test driving factors of urban spatial extension of explanatory power. Results show that the social and economic conditions in non-agricultural population, the whole society fixed asset investment, total retail sales of social consumer goods, per capita GDP, gross industrial output value and the urban spatial expansion has a positive correlation. Each factor of explanatory power from big to small is:the conversion of possibility, distance from woodland, distance from cultivated land, waters from distance, away from the city distance, elevation, slope slope direction, distance from the road.(5) This study constructed two sets of construction land conversion potential model, simulated in 2005-2015, the prediction of urban spatial expansion in 2015-2025. The MLP model accuracy as high as 90.04% and 90.04%. Results show that the two groups of markov chain model is not the possibility of using the land and the cultivated land into construction land is the largest. Soft predicted results of the Validation test proved that the simulation result is accurate, reliable and four kinds of Kappa index to Kno=0.7738, Klocation=0.8062, Klocation with Strata=0.8062, Kstandard=0.7512. KunYu between 2015 and 2025 urban spatial extension prediction results show that the future urban space will continue to extend along the dianchi lake east, south coast, eventually fill the jinning in low altitude channel, form a continuous urban areas. Kun, jade homogenization, the prototype of the integration of regional development.