多种土地覆被产品一致性分析与精度评价——以淮河流域为例

Consistency Analysis and Accuracy Evaluation of Multiple Land Cover Products: Taking the Huai River Basin as an Example

本文以淮河流域为研究区域,基于5种土地覆被分类产品(CLCD、ESACCI-LC、GLC_FCS30、GlobeLand30、MCD12Q1),将各土地覆被类型重分类为农用地、建设用地、未利用地三大类,从面积和空间两方面进行了一致性分析与精度评价。结果表明,5种产品对于淮河流域土地覆被的类型特征具有较强的一致性,面积估算的相关性系数均大于0.9。在3种30 m分辨率土地覆被分类产品中,CLCD的识别精度最高,以此作为参考数据;其他4种产品总体精度在92.37%~95.53%之间,Kappa系数在0.523~0.695之间,GlobeLand30产品与GLC_FCS30产品精度较高且各有优势,ESACCI-LC产品和MCD12Q1产品精度较低。该研究成果可以为不同时空尺度上的土地覆被研究提供参考。

In this paper,the Huaihe River Basin was taken as the research area.Based on five land cover classification products(CLCD,ESACCI-LC,GLC-FCS30,GlobeLand30,MCD12Q1),each land cover type was reclassified into three categories(agricultural land,construction land and unused land).Consistency analysis and accuracy evaluation were carried out from two aspects of area and space.The results showed that the five products had strong consistency in the type characteristics of land cover in the Huaihe River Basin,and the correlation coefficients for area estimation were all greater than 0.9.Among the three land cover classification products with 30 m resolution,CLCD had the highest recognition accuracy and served as a reference data.The overall accuracy of the other four products ranged from 92.37%to 95.53%,with Kappa coefficients ranging from 0.523 to 0.695.GlobeLand30 products and GLC_FCS30 products had high accuracy and each had its own advantages,while ESACCI-LC products and MCD12Q1 products had lower accuracy.This research result could provide reference for land cover research at different temporal and spatial scales.