Vanuatu Subnational NDVI: Dekadal Vegetation Indicators and Anomalies

Dekadal NDVI (Normalized Difference Vegetation Index) indicators for Vanuatu, aggregated by sub-national administrative units using NASA MODIS collection 6.1 satellite data. Produced by the World Food Programme (WFP), the records track vegetation health through 10-day measurements and long-term averages. The data is current as of March 2026.

Use Cases

• Detecting agricultural stress by analyzing the NDVI anomaly percentage (`viq`)
• Comparing current vegetation levels (`vim`) against historical norms (`vim_lta`)
• Weighting the reliability of sub-national aggregates using the `n_pixels` column

Strengths

• Uses NASA MODIS collection 6.1 high-quality satellite imagery
• Includes Pcode references for easy joining with other WFP administrative data
• Provides `n_pixels` to indicate the statistical confidence of each aggregate

Limitations

• Sub-national aggregation obscures hyper-local vegetation changes
• Temporal resolution is limited to 10-day intervals
• Dependent on cloud-free satellite observations for accurate NDVI readings

Provenance

Source

World Food Programme (WFP) via NASA MODIS

Collection Method

Satellite sensor data aggregated by WFP administrative boundaries

Freshness

Updated through March 2026.

Geography

Vanuatu