中国西北地区3种10m全球土地覆被产品林草灌专题要素的一致性评价  

Consistency Evaluation of Thematic Elements of Forest,Grassland and Shrubland for Three 10-meter Global Land Cover Productsin Northwest China

作　　者：康军梅 王君 杨龙伟 KANG Jun-mei;WANG Jun;YANG Long-wei(Xi an Surveying and Mapping Institute,Xi’an Shaanxi 710054,China;Wuhan Design&Research Institute Co.,Ltd.of China Coal Technology&Engineering Group,Wuhan Hubei 430064,China)

机构地区：[1]西安市勘察测绘院,西安710054 [2]中煤科工集团武汉设计研究院有限公司,武汉430064

出　　处：《西华师范大学学报（自然科学版）》2025年第1期42-48,共7页Journal of China West Normal University(Natural Sciences)

基　　金：国家自然科学基金项目(42007279);中煤科工集团有限公司科技创新创业项目(2020-NQ006)。

摘　　要：中国西北地区的土地利用/土地覆被信息对全球气候变化和生态环境保护有重要影响,因此,及时掌握目前公开发布的几种较高分辨率土地覆被产品的空间一致性极其重要。采用FROM-GLC、ESA和ESRI 3种10 m全球土地覆被产品,通过面积比较、逐像元空间叠加和基于样本点的绝对精度评价等方法,分析了这3种产品在林草灌专题要素准确性和空间格局上的差异特征。结果表明:(1)FROM-GLC的总体精度最高,为83.74%;其次是ESA,为68.30%;ESRI的总体精度最低,为52.80%。(2)3种产品林草灌空间一致性较低,完全一致区域面积占比为41.67%,主要分布在研究区的东部;完全不一致区域分布较零散,这些区域地表覆被类型较复杂,地表空间异质性较高。(3)3种产品林地类型的空间一致性较高,草地和灌木类型的判别差异较大。总的来说,草地、灌木等植被类型的精度需要进一步提高。The land use/land cover information in Northwest China has an important impact on global climate change and ecological environment protection.Therefore,it is important to timely grasp the spatial consistency of several high-resolution land cover products currently published.In this study,three 10-meter global land cover products were utilized,including FROM-GLC,ESA,and ESRI.Their differences in the accuracy and spatial pattern of thematic elements of forest,grassland and shrubland were analyzed by the methods of area comparison,per-pixel spatial overlay,absolute accuracy evaluation based on sample points and so on.The results are as following:(1)The overall accuracy of FROM-GLC products is the highest(83.74%),followed by ESA products(68.30%),while the overall accuracy of ESRI products is the lowest(52.80%).(2)The spatial consistency of the three products for the forest,grassland and shrubland is low,and the proportion of completely consistent area is 41.67%,which is mainly distributed in the eastern part of the study area;the distribution of completely inconsistent regions is scattered,and the land cover types in these regions are more complex with higher surface spatial heterogeneity.(3)The spatial consistency of the three products for forest type is high,and the discriminant difference between grassland and shrubland types is large.In general,the accuracy of grassland,shrubland and other vegetation types needs to be further improved.

关 键 词：林地 草地 灌木 空间一致性 精度评价 中国西北 

分 类 号：P237[天文地球—摄影测量与遥感]