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Fig. 1. Location map of the study area in western Guangxi, China.
3. Data and methods
3.1 Data
In this study, MODIS L1B data were used because of its large covered area with a coarse
resolution. Other data sources included vector data, administrative maps, some information
from previous research and the yearbook of Guangxi.
3.1.1 MODIS data
The MODIS instrument is operating on both the Terra and Aqua spacecraft. It has a viewing
swath width of 2,330 km and views the entire surface of the Earth every one to two days, its
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