The land use and land cover change database and its relative studies in China |
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| Authors: | LIU Jiyuan LIU Mingliang DENG Xiangzheng Zhuang Dafang ZHANG Zengxiang LUO Di |
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| Institution: | 1. Inst. of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China|
2. Inst. of Remote Sensing Applications, CAS, Beijing 100101, China |
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| Abstract: | In the mid-1990s, we established the national operative dynamic information serving systems on natural resources and environment. During building the land-use/land-cover change (LUCC) database for the mid-1990s, 520 scenes of remotely sensed images of Landsat Thematic Mapper (TM) were interpreted into land-use/land-cover categories at scale of 1:100,000 under overall digital software environment after being geo-referenced and ortho-rectified. The vector map of land-use/land-cover in China at the scale of 1:100,000 was recently converted into a 1-km raster database that captures all of the high-resolution land-use information by calculating area percentage for each kind of land use category within every cell. Being designed as an operative dynamic information serving system, monitoring the change in land-use/land-cover at national level was executed. We have completed the updating of LUCC database by comparing the TM data in the mid-1990s with new data sources received during 1999-2000 and 1989-1990. The LUCC database has supported greatly the national LUCC research program in China and some relative studies are incompletely reviewed in this paper. |
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| Keywords: | land-use/land-cover change database |
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