The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences. Vol. XXXVII. Part B7. Beijing 2008 
1400 
Veget 
ation 
cover 
types 
area (km2) 
2000-2006 
2000 
2001 
2002 
2003 
2004 
2005 
2006 
Change 
area 
(km 2 ) 
Change 
ratio 
(%) 
NC 
44.13 
34.31 
30.42 
30.84 
52.29 
32.82 
22.46 
-21.66 
-49.1% 
LC 
618.83 
650.52 
564.67 
636.22 
669.79 
683.66 
727.68 
108.86 
17.6% 
MC 
17492.27 
23896.18 
14517.66 
10742.21 
10780.84 
17774.07 
15186.22 
-2306.05 
-13.2% 
HC 
39834.52 
33408.25 
42876.47 
46579.03 
46483.09 
39499.20 
42028.78 
2194.26 
5.5% 
FC 
0.05 
0.53 
0.59 
1.49 
3.79 
0.05 
0.64 
0.59 
Total 
57989.8 
57989.8 
57989.8 
57989.8 
57989.8 
57989.8 
57965.8 
-24.01 
-0.04% 
Table 2. The area of vegetation coverage grade changes in the TGRA 
ACKNOWLEDGEMENTS 
This work has been supported by China’s National Social 
Development Research Program funded by the Ministry of 
Science and Technology (2004DIB3J107), National Key Basic 
Research and Development Program of China (2006CB701303). 
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