快速发展期的西北地区中小城空间扩展分析与评价.pdfVIP

30 6 2014 6 Ecological Economy , Vol. 30, No. 6 (June 2014) 12 2 1. 710064; 2. 710055 20 ; TU984 A 1671-4407(2014)06-109-05 An Urban Spatial Expansion Analysis on the Rapid Developing Small and Medium- Sized Cities in the Northwest: Taking Yulin City of Shaanxi Province as an Example LI Lan1, 2, CHEN Xiaojian2 ’ ’an Shaanxi 710064, China; (1. School of Architecture, Chang an University, Xi ’ , Xi’an Shaanxi 710055, China) 2. School of Architecture, Xi an University of Architecture and Technology Abstract: By processing the image data of Yulin City of Shaanxi Province, some spatial expansion- measured methods are used to quantitatively analyze the extension process, morphological characteristics, the change and extension mode, the spatial form, as well as the rationality of the extension process. Results show that the building up area of Yulin City is in high-speed expansion during the study period, and of periodic characteristics; space form change drastically, and the variation characteristics of each index in the two extension period has obvious difference, while the middle plateau is advantageous to reduce the high- speed expansion negative inertia; the space scale in the early is reasonable roughly while in the later period is irrational for the excessive expans