Study On The Urban Spatial Form Evolution Of Yan-Long-Tu

Urban spatial form is the result of the interaction of a variety of geographic features, these factors include geography, socio-economic development, the natural environment and human activities and other factors. Meanwhile urban spatial form also reflects a comprehensive characterization of urban social, economic and cultural. This characterization can reflect the substance of urban development. According to the urban space is an important form of urban planning and construction, which features a direct impact on a number of major issues.In this study, Yan-ji, Long-jing, Tu-men City as the study area because this area is in the eastern part of Jilin Province. It also is in China, Russia, North Korea three junction area, the location is rather special.The main contents of this paper is the extension of urban spatial morphology evolution Lung region. This paper analyzes the extension of Lung through land use dynamic changes of the three cities, drawn2001-2011, the degree of extension of Lung three cities around the type of land use change; Based on the comparative" analysis of urban spatial morphology process, intuitive demonstrated Yan-ji, Long-jing, Tu-men City architectural changes direction, and awareness of Yan-ji, Long-jing, Tu-men City morphological types of urban space, this paper analyzes the extension of urban spatial morphology evolution Lung regional characteristics, urban spatial morphology obtained three cities compact and degree of changes in the fractal dimension, as well as trends.By extension of the use of urban land areas Lung analysis of dynamic change, Yan-ji City in2001-2011found that the rate of change of agricultural land is relatively high, Long-jing biggest agricultural land area increased, mainly due to the conversion of green space, change the water area is relatively significant; Tu-men City building land area of a small increase, decrease water area, agricultural area sharpest growth, mainly from the conversion of green space. By changing the extension of urban spatial morphology diagram dragon comparative analysis study area was found to Yan-ji main development direction of things, mainly along Highway Long-jing" Yan-ji-Long-jing " highway and " Long-jing Chao-yang-chuan " highway development to the northeast, and Fig. they city’s main development along State Road302to the northeast, northwest; Yan-ji City spatial form type is lumpy urban form, Long-jing and Tu-men City type is linear spatial form of urban spatial morphology. Study found that urban spatial form compactness of the three cities has declined, the three cities of the fractal dimension of urban periphery have risen, which’Yan-ji compactness index and fractal dimension of urban space through the extension of the dragon morphological analysis chart area the biggest change, indicating that urban form Yan-ji significantly reduced chemotaxis round, the city perimeter becomes more complex.By type of cognitive forms of urban space, as well as a method of quantitative evaluation of urban spatial morphology can be more accurate estimate reasonable interpretation, providing the basis for urban development practices and theories of urban spatial development, help to control and predict the city development.