The Sentinel Green Report application leverages Google Earth Engine to measure and
monitor vegetation across the United States. There are four maps created from the Sentinel-2 archive. 1) Greenness Map represents NDVI, which is a surrogate for photosynthetically active plant biomass, for a user-defined composite period; Difference Map 1-compares NDVI to the previous composite period within the same year to illustrate recent vegetation change; Difference Map 2-compares NDVI to same period from the previous year to examine year-over-year vegetation change; Difference Map 3-compares current NDVI to the average NDVI from previous years to examine vegetation change relative to the recent average. These maps can be used for a wide range of applications such as crop monitoring and disaster assessment.