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Comparative Survey on the Grassland Resources of the Loess Plateau by Remote Sensing

LIU Jian-hua,SU Da-xue,ZHONG Hua-ping(Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101,China)  
The paper introduces the changing trends of grassland resources in the Loess Plateau through TM pictures (1999-2000) and data of investigation gained from the RS survey in the year 2000. Based on the same grassland classification system, the scale and the accuracy, the paper sums up the integrating and splicing research of the results of the RS survey data from TM pictures of 1987, and compares the data of the two different periods. Moreover, the RS, GIS and GPS technologies are advocated for the dynamic monitoring of the grassland resources.
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