Therefore, it is very necessary to research methods and establish a framework of desertification vegetation monitoring and evaluation information system at the county level.
因此，以县为单元，研究建立荒漠化植被监测的框架和信息处理和评价方法很有必要。
The advantage of MODIS vegetation monitoring was analyzed. The methods for establishing time series of vegetation indicator by using MODIS data in Shaanxi Province were discussed.
分析了MODIS在植被生长变化监测中的优势，讨论了省级MODIS植被指数序列的建立方法。
Now scientists have tested a new method for monitoring the health of vegetation by measuring emissions that the human eye cannot detect.
如今，科学家试验了一种新的方法，通过测量人类肉眼观测不到的植被释放物质，监测其健康状况。
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