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利用Landsat系列卫星遥感数据,选取1987、1995、2000、2005、2010、2015七个时相,通过影像预处理、归一化指数与非监督分类方法的综合运用、分类后处理等方法,提取广西沿海城镇建设信息。运用统计学与GIS空间分析方法,对广西沿海城镇近30年来时空格局变化的规律特征进行研究:(1)NDVI、MNDWI、NDBI归一化指数方法与聚类非监督分类方法的综合运用,可以快速提取城镇信息;(2)1990年至2000年和2005年至2010年期间,广西城镇建设面积呈快速增长的趋势;(3)广西沿海城镇建设主要集中在北海市海城区、钦州市钦南区和防城港市港口区和东兴市。研究结果为国土资源、生态环境等相关部门提供参考,为广西海岸带生态风险评估提供数据基础。
Using the Landsat series of satellite remote sensing data, seven phases of 1987, 1995, 2000, 2005, 2010 and 2015 were selected. Through the methods of image preprocessing, normalized index and unsupervised classification methods, classification and postprocessing, Coastal town construction information. By using the method of statistics and GIS spatial analysis, this paper studies the regularity of the temporal and spatial patterns of coastal cities and towns in Guangxi over the past 30 years: (1) The integrated use of NDVI, MNDWI and NDBI normalized index methods and cluster unsupervised classification methods can (2) From 1990 to 2000 and from 2005 to 2010, the urban construction area in Guangxi showed a trend of rapid growth; (3) The construction of coastal towns in Guangxi mainly concentrated in Haicheng District of Beihai City and Qinnan of Qinzhou City District and Fangchenggang Port Area and Dongxing City. The results provide references for relevant departments such as land resources and ecological environment, and provide data foundation for ecological risk assessment in Guangxi coastal zone.