摘要
典型湿地类型分类对于湿地生态环境保护和建设具有重要意义。以鄱阳湖湿地为研究区,利用2015年Landsat 8 OLI遥感影像数据,辅以数字高程模型(DEM)、归一化植被指数(NDVI)、归一化水体指数(NDWI)等数据,基于面向对象的基础上,综合运用阈值法、决策树法和分层分类等方法,对鄱阳湖湿地枯水期地类进行了解译和提取,并取得了较好的分类效果。研究结果表明:(1)辅以多种数据和先易后难的分层分类方法是有效提取地类信息的基础;(2)通过局部方差分析法对影像不同的分割尺度进行评价表明,分割尺度为50时,分割尺度最优;(3)面向对象方法的地类分类结果总体精度为86.5%,Kappa系数为0.84。以上结论表明基于中低分辨率遥感影像,采用多源数据和面向对象的分层分类方法,能够获得较高精度的湿地地类分布,为枯水期候鸟栖息地的研究和保护提供参考依据。
The classification of typical wetland types is of great significance for wetland ecological environment protection and construction. Taking Poyang Lake wetland as the study area, the land types of Poyang Lake wetland in low water period were classified and extracted based on the multi-source data including the 2015 Landsat 8 OLI satellite remote sensing image data, digital elevation model（DEM）, normalized difference vegetation index（NDVI）, normalized difference water index（NDWI）, the spatial distribution maps of land cover data using multi-methods, which integrated object-oriented, threshold classification, decision tree classification and hierarchical classification. The better classification results were obtained in this study. The results show that：（1） classification method combined with a variety of auxiliary data and from point to area is effective based information extraction;（2） the optimal segmentation scale was 50 when we evaluated the different image segmentation scale based on local variance analysis method;（3） based on object oriented the method of class classification,the overall accuracy is 86.5%, Kappa coefficient was 0.84. The results suggest that the low resolution remote sensing images based on the hierarchical classification method of multi-source data and object oriented, can obtain high accuracy of the distribution of wetland types, provide a reference for the research and protection of migratory bird habitat selection in low water period.
作者
刘俊
涂飞云
刘鹏
韩卫杰
游晓庆
黄晓凤
Liu Jun Tu Feiyun Liu Peng Han Weijie You Xiaoqing Huang Xiaofeng(Jiangxi Academy of Forestry, Nanehang Jiangxi 330013, China Shangrao City Forestry Research Institute, Shangrao Jiangxi 334000, China)
出处
《南方林业科学》
2017年第3期39-44,共6页
South China Forestry Science
基金
江西省主要学科学术和技术带头人项目(项目编号:20153BCB22007)
江西省科研院所基础设施配套项目(项目编号:20151BBA13037)
关键词
鄱阳湖湿地
枯水期
多源数据
面向对象
Poyang Lake wet
low water period
multi-source data
object-oriented
