The survey of land use at county level is the basic work for land management and the actual accurate data resource of land cover in our country.
县级土地利用调查是土地管理的基础性工作，是我国各级土地利用现状准确数据的实际来源。
Land resource management need to gain the cadastre data from the distributed and heterogeneous database.
从分布异构的地籍数据库提取数据，实现国家地籍数据总归户。
The data of cultivated land from Hunan Province Territory Resource Bureau since 2000. The same as in the following table.
从2000年起，耕地面积为国土资源厅统计数据（后同）。
The data of cultivated land from Hunan Province Territory Resource Bureau since 2000. The same as in the following table.
从2000年起，耕地面积为国土资源厅统计数据（后同）。
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