Huang Yilong. Eco-economic system of sustainable land use. Rural Eco-Environment, 2000, 16(2): 45-48.] Agreement analysis of multi-sensor satellite remote sensing derived land cover products in the Europe Continent
The information about land cover and its dynamic change is essential for the global change and regional sustainable development studies. With the development of remote sensing and and cover interpretation technology, the land cover information derived from satellite remote sensing imagery become the only way to obtain land surface information effectively and economically, especially in large-scale regions. Free global land cover products, e. g. GLC BCOVER2009, GLC2000, MODIS2000, GLOBCOVER2005, are now popularly used by worldwide scientists in many diverse fields. To get a cross- referenced research results, it is fundamental and critical for secitists to pre-estimate the accuracy of each land product and pre- assess the consistency of different land products in a specific region. Supported by the above 4 land cover products, this study aims at analyzing the consistency and heterogeneity, by using area correlation analysis, mix- up pixs analysis,spatial consistency analysis, and reference precision analysis methods. The results show: (1) The 4 land cover products have similar deseriptions about the the construction of European land cover. Cropland and forestland are the dominant land cover types, followed by grassland, water body and other land cover types. (2) Crcpland land and forest land have the lowest mix-up ratios and the highest consistencies, while the grassland, shrubland, and bareland have the highest mix-up ratios and low consistencies. (3) There are 75% land area in Europe owing a relative high consistency, which means at least 3 prcducts indicate the same type among all 4 products. Specifically, in the Eastern Scandinavian Peninsula,the Central-eastern Europe plains, and the Paris basin, there are higher consistency. While in the western Scandinavian Peninsula, the Kola Peninsula, the northern Pechora River- southern Novaya Zemlya, the Iberian Peninsula and the downstream region of Volga river, there are lower consistency among different products. (4) The reference precision between different land cover products ranges from 38.56% to 77.65%. The group of GLOBCOVER2009/ GLOBCOVER2005 has the highest reference precisions, which refers the error caused by land changes is largely smaller than the error caused by the interpretation process due to different institutions, sensors, land classification systems, and interpretation methods.