首页|期刊导航|大气和海洋科学快报：英文版|Spatial and Quantitative Comparison of Satellite-Derived Land Cover Products over China
大气和海洋科学快报：英文版2012，Vol.5Issue(5)：426-434,9.
Spatial and Quantitative Comparison of Satellite-Derived Land Cover Products over China
Spatial and Quantitative Comparison of Satellite-Derived Land Cover Products over China
摘要
Abstract
Because land cover plays an important role in global climate change studies, assessing the agreement among different land cover products is critical. Significant discrepancies have been reported among satellite-derived land cover products, especially at the regional scale. Dif- ferent classification schemes are a key obstacle to the comparison of products and are considered the main fac- tor behind the disagreement among the different products. Using a feature-based overlap metric, we investigated the degree of spatial agreement and quantified the overall and class-specific agreement among the Moderate Resolution Imaging Spectoradiometer (MODIS), Global Land Cover 2000 (GLC2000), and the National Land Cover/Use Data- sets (NLCD) products, and the author assessed the prod- ucts by ground reference data at the regional scale over China. The areas with a low degree of agreement mostly occurred in heterogeneous terrain and transition zones, while the areas with a high degree of agreement occurred in major plains and areas with homogeneous vegetation. The overall agreement of the MODIS and GLC2000 products was 50.8% and 52.9%, and the overall accuracy was 50.3% and 41.9%, respectively. Class-specific agree- ment or accuracy varied significantly. The high-agreement classes are water, grassland, cropland, snow and ice, and bare areas, whereas classes with low agreement are shru- bland and wetland in both MODIS and GLC2000. These characteristics of spatial patterns and quantitative agree- ment could be partly explained by the complex landscapes, mixed vegetation, low separability of spectro-temporal- texture signals, and coarse pixels. The differences of class definition among different the classification schemes also affects the agreement. Each product had its advantages and limitations, but neither the overall accuracy nor the class-specific accuracy could meet the requirements of climate modeling.关键词
土地覆盖/空间格局/中国地区/卫星/MODIS/量比/全球气候变化/分类方案Key words
land cover/comparison/spatial pattern/quantitative agreement分类
信息技术与安全科学引用本文复制引用
GAO Hao,JIA Gen-Suo..Spatial and Quantitative Comparison of Satellite-Derived Land Cover Products over China[J].大气和海洋科学快报：英文版,2012,5(5):426-434,9.基金项目
This study was supported by the National Basic Research Program of China （Grant No. 2009CB723904）, the Strategic Priority Research Program of the Chinese Academy of Sciences （Grant No. XDA05090201）, and the National Natural Science Foundation of China （Grant No. 40810059003）. The MODIS product was provided by the Land Processes Distributed Active Archive Center （LP DAAC）. The GLC2000 product was provided by the Global Vegetation Unit of Joint Research Centre. We also wish to thank the Data Shari （）
