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冰川冻土 ›› 2016, Vol. 38 ›› Issue (3): 829-835.doi: 10.7522/j.issn.1000-0240.2016.0093

• 生态经济与可持续发展 • 上一篇    下一篇

基于夜间灯光的1992-2012年甘肃省城市空间扩展研究

李俊峰, 潘竟虎   

  1. 西北师范大学 地理与环境科学学院, 甘肃 兰州 730070
  • 收稿日期:2016-02-21 修回日期:2016-05-01 出版日期:2016-06-25 发布日期:2016-09-21
  • 通讯作者: 潘竟虎,E-mail:panjh-nwnu@163.com. E-mail:panjh-nwnu@163.com
  • 作者简介:李俊峰(1989-),男,山西洪洞人,现为西北师范大学在读硕士研究生,主要从事遥感与地理信息系统应用研究.E-mail:lijunfeng261@126.com
  • 基金资助:
    国家自然科学基金项目(41361040);甘肃省自然科学基金项目(1506RJZA117)资助

Spatial expansion of cities at county-level or above in Gansu Province from 1992 to 2012 based on DMSP nighttime light images

LI Junfeng, PAN Jinghu   

  1. College of Geographic and Environmental Science, Northwest Normal University, Lanzhou 730070, China
  • Received:2016-02-21 Revised:2016-05-01 Online:2016-06-25 Published:2016-09-21

摘要: 利用1992年、2002年和2012年DMSP/OLS 夜间灯光遥感影像、MODIS NDVI产品、LandsatTM/ETM影像和统计数据,提取甘肃省县级及以上城市的建成区轮廓,对比分析了统计-植被指数法与现有基于DMSP数据中普遍采用的4种常规方法在快速提取城市轮廓中的优劣。结果表明:统计–植被指数法较好地集成了统计数据法的高效、计算简便、数据量小的特点,以及较高分辨率空间数据法对细节反映好的优势,提取的结果误差较其余4种方法低。对提取的城市建成区以DMSP灰度值为权重计算了城市重心轨迹,并采用城市扩展强度和城市紧凑度指数,分析了近20a甘肃省主要城市空间形态的变化特征,城市建成区的扩展模式主要表现为“圈层式”延伸和“跳跃式”新城区的建立。

关键词: 城市扩展, 夜间灯光, 重心迁移, 甘肃省

Abstract: Using DMSP/OLS nighttime light images,MODIS NDVI product,Landsat TM/ETM remote sensing images and statistical data,in this paper,the temporal and spatial patterns of urban expansion of the16 cities at county-level or above in Gansu Province from 1992 to 2012 were analyzed. The advantages and disadvantages of the proposed statistical-vegetation index method and the existing four kinds of general methods for DMSP data, which were used to extracturban built-up areas,were analyzed and evaluated. Results show that the statisticalvegetation index method well integrates the advantages of statistical data method and high resolution spatial data method,which is characterized convenience in calculation,high efficiency,small amount data needed,easing the workloads and also describing the detail well. The trajectory of the urban gravity center was calculated based on the built-up areas extracted from DMSP images,with the digital number values in the built-up areas as the weight of gravity center. Evolve characteristics of spatial morphology of the16 cities at county-level or above in Gansu Province from 1992 to 2012 were analyzed by using urban expansion intensity and compactness index. The expansion styles of built-up areas are mainly in the ways of circle type expansion and jump type new urban area construction.

Key words: urban expansion, nightlight data, gravity center migration, Gansu Province

中图分类号: 

  • C922