Extraction and Analysis of Land Cover Heterogeneity over China |
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Authors: | Yu Wentao Li Jing Liu Qinhuo Zeng Yelu Yin Gaofei Zhao Jing Xu Baodong |
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Institution: | 1.State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing 100101, China; 2.Joint Centre for Global Change Studies (JCGCS), Beijing 100875, China; 3.College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract: | Spatial heterogeneity exists in land surface at every scale, and it is one of key factors to bring uncertainty to land parameter retrieval from remote-sensed data. This paper proposed a methodology to use the boundary length among different land cover types to characterize and quantify land surface heterogeneity based on high-resolution land cover images. Then the heterogeneity feature at 1 kilometer scale in China was extracted from “GlobalLand30” land cover datasets with the spatial resolution of 30 m. The mixed structure, degree of fragmentation and intra-heterogeneity of eight main vegetation biomes from MODIS land cover product over heterogeneous surface in china were analyzed. Mountain area and ecotone are more heterogeneous than other regions. Savanna biome (average boundary length is 7 426 meters) is the most heterogeneous zone followed by forest, grass/crop and shrub biome with average boundary length of 4 323, 3 160, 1 779 meters, respectively. |
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Keywords: | Parameter inversion Radiative transfer Land cover dataset Spatial heterogeneity |
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