基于1985—2015年Landsat MSS/TM/OLI影像的面向对象SVM分类的威海市土地利用及变化分析

Land Use and Change Analysis Based on Object-oriented SVM Classification from Landsat MSS/TM/OLI Images from 1985 to 2015 in Weihai

威海的城市发展是滨海城市的代表,利用Landsat MSS/TM/OLI影像采用面向对象SVM分类技术提取了威海市1985—2015年7期的土地利用类型,并基于土地利用分类结果计算了土地利用动态度和土地利用的协方差矩阵。结合当地经济发展,分析土地利用的时空变化特征,研究结果表明:1)面向对象的SVM分类方法精度较高。2)近30年威海市的土地利用变化较大。3)土地利用类型的变化与经济发展密切相关,不同的土地利用类型的变化与经济发展的相关性不一样。

The urban development model of Weihai is the representative of the coastal city,Landsat MSS/TM/OLI images were used to extract the land use types of Weihai from 1985 to 2015 by using object-oriented SVM classification technology.Based on the result of land use classification,the land use dynamic degree and the covariance matrix of land use were calculated.Combined with local economic development,the spatiotemporal characteristics of land use were analyzed,the result shows that:(1)The object-oriented SVM classification method has higher accuracy.(2)In the past 30 years,the land use of Weihai has changed immensely.(3)The change of land use types is closely related to economic development.The correlation varies between different land use types and economic development.