七套土地覆被数据在羌塘高原的精度评价（英文）

编号 zgly0001683631

文献类型 期刊论文

文献题名 七套土地覆被数据在羌塘高原的精度评价（英文）

作者 刘琼欢  张镱锂  刘林山  李兰晖  祁威 

作者单位 KeyLaboratoryofLandSurfacePatternandSimulation  InstituteofGeographicSciencesandNaturalResourcesResearch  CAS  UniversityofChineseAcademyofSciences  CASCenterforExcellenceinTibetanPlateauEarthSciences 

母体文献 Journal of Geographical Sciences 

年卷期 2019年11期

年份 2019 

分类号 P237 

关键词 landcoverdatasets  spatialaccuracyassessment  remotesensing  QiangtangPlateau  HighAsia 

文摘内容 We analyzed the spatial local accuracy of land cover(LC) datasets for the Qiangtang Plateau, High Asia, incorporating 923 field sampling points and seven LC compilations including the International Geosphere Biosphere Programme Data and Information System(IGBPDIS), Global Land cover mapping at 30 m resolution(GlobeLand30), MODIS Land Cover Type product(MCD12 Q1), Climate Change Initiative Land Cover(CCI-LC), Global Land Cover 2000(GLC2000), University of Maryland(UMD), and GlobCover 2009(GlobCover). We initially compared resultant similarities and differences in both area and spatial patterns and analyzed inherent relationships with data sources. We then applied a geographically weighted regression(GWR) approach to predict local accuracy variation. The results of this study reveal that distinct differences, even inverse time series trends, in LC data between CCI-LC and MCD12 Q1 were present between 2001 and 2015, with the exception of category areal discordance between the seven datasets. We also show a series of evident discrepancies amongst the LC datasets sampled here in terms of spatial patterns, that is, high spatial congruence is mainly seen in the homogeneous southeastern region of the study area while a low degree of spatial congruence is widely distributed across heterogeneous northwestern and northeastern regions. The overall combined spatial accuracy of the seven LC datasets considered here is less than 70%, and the GlobeLand30 and CCI-LC datasets exhibit higher local accuracy than their counterparts, yielding maximum overall accuracy(OA) values of 77.39% and 61.43%, respectively. Finally, 5.63% of this area is characterized by both high assessment and accuracy(HH) values, mainly located in central and eastern regions of the Qiangtang Plateau, while most low accuracy regions are found in northern, northeastern, and western regions.