基于遥感的长沙—株洲—湘潭城市扩展研究

A STUDY OF CHANGSHA—ZHUZHOU—XIANGTAN URBAN EXTENSION BASED ON REMOTE SENSING

通过实地考察建立图像解译标志,利用多时相遥感图像序列,形成城市变化图,研究长沙、株洲、湘潭(简称长、株、潭)1966～1999年不同时期城市特征、扩展方式、方位和速度,并对2000～2010年城市发展状况进行初步预测.研究结果表明: 长、株、潭城市在不同时期有基本相同的扩展方式; 扩展方位并非三市融合方向; 扩展速度呈指数增展,且长沙市的扩展速度明显高于株、潭两市的扩展速度; 2000～2010年间长、株、潭城市仍将高速扩展,三市将进一步融合.

Based on setting up image interpretation criteria through field investigation and compiling urban change map by means of multi - temporal sequence remote sensing image, this paper has studied urban characteristics, expansion model, growth orientation and growth velocity of Changsha city, Zhuzhou city and Xiangtan city （Chang - Zhu -Tan） in the period of 1966 - 1999, and forecasted the development of urban areas in the period of 2000 2010. According to the research result, Chang- Zhu -Tan have the same expansion model, the growth orientation of the three cities doesn＇ t make for their integration in geography, their expansion velocity is increasing in exponential form, the development of Changsha will be the fastest among these cities during this period, and Chang - Zhu - Tan will maintain high speed expansion and tend to become integrated..