基于多源遥感影像的城市化近域演化特征分析

Analysis on the Evolution Characteristics of the Near-field of an Urbanized Area Based on Multi-source Remote Sensing Images

采用多期高分2号(GF-2)和Landsat ETM+/OLI遥感影像,应用遥感技术和GIS空间分析方法,探讨分析中小尺度城市的地域空间演化特征。研究结果表明,2000—2019年间运城市盐湖区城市地域空间不断扩大,前期以量的扩张为主,后期转变为质的填充;城市主要向北部扩展,发展较快的方向为40°~60°和110°~130°;盐湖区城市地域演化总体呈现出"合理—不合理—合理"的发展模式;城市化地域空间演化表现为外延扩展、轴向扩展和飞地扩展3种类型。GF-2影像结合Landsat影像可以有效监测城市地域空间演化过程,为城市精明增长和健康发展提供科学依据。

The multi-stage GF-2 and Landsat ETM+/OLI remote sensing images are used to analyze the regional spatial evolution characteristics of small and medium-sized cities by using remote sensing technology and GIS spatial analysis method.The results indicated that from 2000 to 2019,the urban regional space of Yuncheng Salt Lake Area has been expanding continuously, with quantitative expansion in the early stage and qualitative filling in the later stage.The city mainly expands to the north, and the directions of rapid development are 40° ~ 60° and 110° ~ 130°.The evolution of urban area in the Salt Lake region presents a development pattern of “reasonable-irrational-reasonable”.The spatial evolution of urbanized area appears as three types: extension expansion type, axial expansion type and enclave expansion type.The results show that GF-2 images combined with Landsat images can effectively monitor the evolution of urban regional space, and provide scientific basis for the smart growth and healthy development of cities.