Data currency evaluation method of the second national land survey(第二次全国土地调查成果现势性评估方法) gan GUOLyuyi(郭绿奕), DAIYunzhuo(戴韫卓), DUZhenhong(杜震洪), ZHANGFeng(张丰), LIRongya(李荣亚)

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