El Salvador Subnational NDVI: Dekadal Vegetation Indices and Anomalies

Offering dekadal (10-day) NDVI vegetation indicators for El Salvador aggregated by sub-national administrative units, produced by the World Food Programme (WFP). The data is derived from NASA's MODIS collection 6.1 (Aqua and Terra satellites) and includes historical baselines and anomalies. It serves as a monitoring tool for agricultural and environmental health across the country's administrative regions.

Use Cases

• Monitoring agricultural health by comparing current NDVI (vim) against long-term averages (vim_lta)
• Identifying drought or flood impact using the NDVI anomaly percentage (viq)
• Analyzing vegetation trends over time across specific Pcode-identified administrative regions

Strengths

• Uses NASA MODIS collection 6.1 high-resolution satellite data
• Includes vim_lta for historical baseline comparison
• Provides n_pixels column to indicate the statistical weight and reliability of each aggregate

Limitations

• Aggregated data loses the spatial granularity of the original 250m/500m MODIS pixels
• Satellite-derived indices in tropical regions like El Salvador can be affected by persistent cloud cover

Provenance

Source

World Food Programme (WFP) using NASA MODIS (Aqua and Terra) collection 6.1

Collection Method

Satellite remote sensing data aggregation by administrative boundary

Freshness

Updated as of March 2026.

Geography

El Salvador (sub-national level)