摘要
GF-5卫星已经在生态环境监测、土地资源调查、荒漠化监测、水资源管理调度等领域开展了应用,但是关于城市不透水面提取还没有针对GF-5卫星的相关研究,因此研究GF-5卫星的不透水面提取对推动其在城市环境等领域的应用具有重要意义。分析GF-5卫星数据特点,以全谱段数据为基础,利用混合像元分解法研究GF-5卫星提取城市不透水面的性能,并和Landsat8 OLI数据做对比分析。试验结果表明:GF-5卫星提取的不透水面分布与Landsat 8 OLI数据的结果总体一致,由于GF-5卫星空间分辨率更高,提供的不透水面细节信息更加丰富,因此对裸土有一定的区分能力,尤其是对干燥裸土;但GF-5卫星在提取城市不透水面时容易受到阴影的干扰。总体而言,GF-5卫星在城市不透水面监测方面具有较大的应用潜力,有望在中国的城市环境监测领域发挥重要作用。
GF-5 is an environment-observed satellite in the significant special space-based system of the National High-Resolution Earth Observation System,which has the ability of comprehend observation and monitoring for atmosphere and land simultaneously.Thus,GF-5 has been widely applied in several fields including ecological environment monitoring,land resources survey,desertification monitoring and water resources management.However,there is lacking of the research on Impervious Surface(IS)mapping based on GF-5.Thus,the research of GF-5 on IS mapping is of great importance for propelling the application of GF-5 on fields like urban environment.In this research,the characteristics of GF-5 dataset were explored.The urban IS was mapped by linear spectral unmixing method on GF-5 full spectral dataset.The performance of GF-5 was analyzed and compared with that of Landsat 8 OLI.The results of city impervious surface distribution which is extracted by GF-5 is generally consistent with that of Landsat 8.While the result of GF-5 can provide more details of the city due to the higher spatial resolution,which enhances the ability of distinguishing bare soil especially for dry soil from IS.However,due to the finer spatial resolution,shadow problems bring some influence to the IS mapping of GF-5.In general,GF-5 has great application potential on monitoring urban IS,which is expected to play an important role in urban planning and environmental monitoring of China.
作者
程吉
孙根云
姚延娟
朱海涛
刘思含
黄惠
张爱竹
王飞
CHENG Ji;SUN Genyun;YAO Yanjuan;ZHU Haitao;LIU Sihan;HUANG Hui;ZAHNG Aizhu;WANG Fei(College of Oceanography and Space Informatics,China University of Petroleum(East China),Qingdao 266580,China;Laboratory for Marine Mineral Resources,Qingdao National Laboratory for Marine Science and Technology,Qingdao 266237,China;National Key Laboratory of Satellite Remote Sensing for Environmental Protection,Satellite Environment Center,Ministry of Ecology and Environment,Beijing 100094,China)
出处
《人民黄河》
CAS
北大核心
2020年第12期161-168,共8页
Yellow River
基金
国家重点研发计划项目(2019YFE0126700)
国家自然科学基金资助项目(41871270,41971292,41801275)。