Sao Tome and Principe: Subnational Dekadal NDVI and Vegetation Anomalies

Offering dekadal NDVI (Normalized Difference Vegetation Index) indicators for Sao Tome and Principe, aggregated from NASA MODIS collection 6.1 satellite data by the World Food Programme. It tracks vegetation health through 10-day measurements, long-term averages, and percentage anomalies mapped to sub-national administrative units. The data was last updated in March 2026 and utilizes WFP-defined administrative boundaries.

Use Cases

• Monitoring agricultural health by comparing current vim values against the long-term average vim_lta
• Identifying drought or flood impacts using the viq anomaly percentage column
• Validating spatial data reliability by checking the n_pixels count for each administrative unit

Strengths

• Uses NASA MODIS collection 6.1 high-resolution satellite data
• Includes a long-term average (vim_lta) for historical baseline comparison
• Provides pixel counts (n_pixels) to indicate the data density of each aggregate

Limitations

• Geographic scope is restricted to Sao Tome and Principe
• Aggregated at sub-national units which may mask hyper-local vegetation variations
• Dependent on WFP-specific administrative Pcodes for spatial joining

Provenance

Source

World Food Programme (WFP) using NASA MODIS collection 6.1

Collection Method

Satellite sensor aggregation

Freshness

Updated as of March 2026.

Geography

Sao Tome and Principe