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National Integrated Drought Information System
Evaporative Stress Index data from NASA SERVIR were available in raster format.
NDMC, USGS, HPRCC
Vegetation Drought Response Index data from the National Drought Mitigation Center (NDMC) were available in raster format.
Vegetation Health Index data from NOAA's Center for Satellite Applications and Research (STAR) were available in raster format.