摘要
为快速准确地获取城市园林绿化覆盖率,以北京市西城区的陶然亭街道为对象,基于高分辨率遥感影像,探讨了多种植被指数在城市园林绿化覆盖率提取中的可行性。结果表明:随着遥感影像空间分辨率的提高,有助于减少可见光植被指数提取结果中的地物误分,但基于0.5 m与0.8 m空间分辨率遥感影像的可见光植被指数所提取的绿化覆盖率均与实际值相差较大,因此不建议将其应用于园林绿化覆盖率提取研究中。而基于0.8 m空间分辨率遥感影像的归一化植被指数的绿化覆盖率提取比较适用于内部建筑高度较低的区域,可作为园林绿化资源普查工作的重要参考。在此基础上,还应用归一化植被指数,获取到北京2019年北京城市核心区(东城区和西城区)的绿化覆盖率为23.82%。
This paper made a case study of the Taoranting Street in Xicheng District of Beijing by applying the high-resolution remote sensing image to explore the feasibility of various vegetation indices in extracting the urban landscape coverage.The results shows that a rise in the remote sensing image resolution can lower the misclassification of surface features in the visible light vegetation index extraction.However,the green coverage ratio extracted by the visible light vegetation indices with 0.5 m and 0.8 m resolution remote sensing images largely deviate from the actual value,so these indices should not be applied to extract the landscaping coverage ratio.The normalized vegetation index with 0.8 m resolution remote sensing images can extract the green coverage ratio with low internal buildings.So,it can be a good reference index in the field census of landscaping resources.Moreover,the normalized vegetation index with higher extraction accuracy was applied to extract that the green coverage ratios of core urban areas(Dongcheng District and Xicheng District),Beijing in 2019 was 23.82%.
作者
徐慧婷
张欣
谢军飞
李新宇
戴子云
孙正海
XU Huiting;ZHANG Xin;XIE Junfei;LI Xinyu;DAI Ziyun;SUN Zhenghai(College of Landscape Architecture,Southwest Forestry University,Kunming Yunnan 650224,P.R.China;College of Landscape Architecture and Tourism,Hebei Agricultural University,Baoding Hebei 071000,P.R.China;Beijing Key Laboratory of Ecological Function Assessment and Regulation Technology of Green Space,Beijing Institute of Landscape Architecture,Beijing 100102,P.R.China)
出处
《西部林业科学》
CAS
北大核心
2023年第4期101-107,共7页
Journal of West China Forestry Science
基金
国家自然科学基金面上项目(31770751)。
关键词
园林绿化覆盖率
高分辨率遥感影像
可见光植被指数
归一化植被指数
urban green coverage rate
high spatial resolution remote sensing images
visible vegetation index
normalized difference vegetation index
作者简介
第一作者:徐慧婷(1996-),女,硕士研究生,主要从事园林生态研究。E-mail:510310248@qq.com;通信作者:孙正海(1978-),男,教授,博士,主要从事植物种质创新与高效培育研究。E-mail:szh@swfu.edu.com。
