MCD19A3CMG: Daily Global Vegetation Indices from MODIS MAIAC

MCD19A3CMG Version 6.1 provides daily, atmospherically corrected Normalized Difference Vegetation Index (NDVI) and Enhanced Vegetation Index (EVI) data at a 0.05-degree resolution globally. The product includes five science layers: NDVI, NDVI normalized to a fixed geometry, gap-filled NDVI, EVI, and EVI normalized to a fixed geometry. A known artifact affects retrievals over the southern polar region during summer months, with a software fix implemented for forward processing in June 2023.

Use Cases

• Monitoring global vegetation health and phenology based on daily NDVI and EVI layers.
• Assessing land surface changes for climate modeling using a 0.05-degree Climate Modeling Grid.
• Analyzing vegetation trends with gap-filled NDVI data to mitigate data loss from clouds or aerosols.
• Studying radiative properties of land surfaces using atmospherically corrected vegetation indices.

Strengths

• Provides daily global coverage at a consistent 0.05-degree (approx. 5.6 km) resolution.
• Includes five distinct science dataset layers for vegetation analysis, including normalized and gap-filled versions.
• Atmospherically corrected using the MAIAC algorithm to reduce scattering and absorption effects.

Limitations

• Contains a known artifact in EVI, NDVI, and NDVI_gapfill layers over the southern polar region during summer; existing affected data will not be reprocessed.
• Specific column names, row counts, and file sizes are not provided in the available metadata.
• License is ambiguously listed as 'other-license-specified' without further detail.

Provenance

Source

National Aeronautics and Space Administration (NASA)

Collection Method

Produced from combined MODIS Terra and Aqua satellite data using the Multi-Angle Implementation of Atmospheric Correction (MAIAC) algorithm.

Freshness

Last updated on 2026-04-09 according to datagov.

Geography

Global coverage on a 0.05-degree Climate Modeling Grid.