Challenges to the Use of NDVI in Land Degradation Assessments
Technological barriers: Currently, most global datasets useful for environmental applications are archived in databases that can be accessed using the Internet. These include the GIMMS, NOAA-PAL, LTD, and FASIR datasets. There are also free online data service platforms for executing preprocessing operations (such as data smoothing, spatial and temporal subsetting, mosaiking, and re-projection) of MODIS time-series vegetation indices (such as NDVI and EVI). Currently, the Internet speed for many parts of the world remains too slow to enable effective access to these datasets or online processing.
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