干旱区生态环境知识资源中心(Arid): 基于MODIS的西藏高原土地覆盖分类研究

Arid

	基于MODIS的西藏高原土地覆盖分类研究
其他题名	Land Cover Mapping in the Tibet Plateau Using MODIS Imagery
	除多 1; 王伟 1; 张镱锂 ; 刘林山
来源期刊	资源科学
ISSN	1007-7588
出版年	2010
卷号	32 期号:11 页码:2152-2159
中文摘要	以中国植被图集(以下简称图集)西臧高原部分为主要参考数据, 根据2004年9月13日和14日2景镶嵌的MODIS遥感图像, 用最大似然估计分类器对西藏高原的土地覆盖类型进行了分类, 并采用西藏高原数字高程模型(DEM)对MODIS分类结果进行了分析和改进, 最后分别用混淆矩阵和图集中西藏高原植被分类汇总面积对M ODIS土地覆盖分类结果进行了分类精度评价. 结果表明: ①MODIS遥感图像能够有效地分类出西藏高原的主要土地覆盖类型; ②根据西藏高原植被的垂直带性分布特点, 由DEM改进的MODIS土地覆盖分类精度明显提高, 主要土地覆盖类型的面积绝对误差都小于2%, 其中, 河流与湖泊、森林、高寒荒漠、作物和山地草原的绝对误差都在 1%以下; ③混淆矩阵分析的平均分类精度为87.68%
英文摘要	Land cover is a fundamental variable impacting and linking many parts of the human and physical environments and is a critical biophysical parameter determining the functioning of terrestrial ecosystems in biogeochemical cycling, hydrological processes, and the interaction between the surface and the atmosphere. Of various sources of land cover data, satellite remote sensing is particularly attractive. The first MODIS receiving station in the Tibetan Plateau was established in Tibet Institute of Plateau Atmospheric and Environmental Sciences in year 2002. Taking the China vegetation classification map with a scale of 1:1,000,000 as ground truth, land cover classification in the Tibetan Plateau was performed using the maximum likelihood classification algorithm based on MODIS band 6-2-1 campsite acquired on September 13 and 14, 2004.The results of the land cover classification were improved by integrating a digital elevation model(DEM)into the classification procedure. Two methods were used to carry out accuracy assessment. One was estimation from training data using confusion matrixes. The other was comparison between the total areas of land cover classification from DEM and from the digitized vegetation classification map of the Tibetan Plateau. Twelve land cover types in the Tibetan Plateau were classified. The representation of the derived land cover types was improved obviously using DEM.The absolute classification errors for alpine sparse vegetation, alpine frigid steppe, shrub and meadows, and bare land was found to be around 4%-8%, and for the rest of land cover types smaller than 2%,in which, the errors for lakes and rivers, forest, alpine frigid deserts, crop land, and mountain steppe were generally less than 1%.The overall accuracy of the land cover classification for the Tibet Plateau in terms of the confusion matrix was approximately 87.68%. Classification results showed that the alpine frigid steppe and alpine sparse vegetation are primary land cover types in Tibet, accounting for 32.32%and 20.57%of the total area, respectively. The former is overwhelmingly distributed in the northern and northwestern Tibetan plateau and some high mountain areas in the central Tibet in a high altitude and frigid climate. The latter is primarily distributed in certain high mountains above 5000 m. Affected by complexity of terrain, climate, and other factors in the Tibetan plateau, making accurate, comprehensive, and geospatially consistent land cover maps remains a challenge. With increasing availability of improved spatial, spectral, geometric, and radiometric resolution satellite imageries, detailed ground-truth data, and improved classification algorithms,it is possible to produce more accurate, comprehensive, and geospatially consistent land cover maps for the Tibet Plateau in the future
中文关键词	土地覆盖分类 ; 西藏高原
英文关键词	EOS/MODIS Land cover classification EOS/MODIS Tibetan Plateau
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ENERGY FUELS
WOS研究方向	Energy & Fuels
CSCD记录号	CSCD:4051319
来源机构	中国科学院地理科学与资源研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226125
作者单位	1.西藏高原大气环境科学研究所, 拉萨, 西藏 850000, 中国; 2.International Centre for Integrated Mountain Development(ICIMOD), Kathmandu, Nepal
推荐引用方式 GB/T 7714	除多,王伟,张镱锂,等. 基于MODIS的西藏高原土地覆盖分类研究[J]. 中国科学院地理科学与资源研究所,2010,32(11):2152-2159.
APA	除多,王伟,张镱锂,&刘林山.(2010).基于MODIS的西藏高原土地覆盖分类研究.资源科学,32(11),2152-2159.
MLA	除多,et al."基于MODIS的西藏高原土地覆盖分类研究".资源科学 32.11(2010):2152-2159.