Liberia Subnational NDVI: 10-Day Vegetation Indicators and Anomalies

Liberia's sub-national vegetation health is tracked through dekadal NDVI indicators derived from NASA MODIS collection 6.1 satellite data. Maintained by the World Food Programme, the data aggregates 10-day observations into administrative units to monitor agricultural conditions and drought. The records include long-term averages and percentage anomalies for every sub-national region.

Use Cases

• Assessing crop stress by comparing current vim values to the vim_lta long-term average
• Mapping regional drought patterns using the viq anomaly percentage column
• Validating administrative-level environmental changes using the n_pixels count to ensure data representativeness

Strengths

• Uses NASA MODIS collection 6.1 high-quality satellite imagery
• Includes Pcode references for standardized geospatial joining with other WFP datasets
• Provides n_pixels count to indicate the data density and reliability of each aggregate

Limitations

• Spatial resolution is limited to administrative unit aggregates rather than raw pixel-level data
• Cloud cover during Liberia's rainy season may interfere with MODIS sensor accuracy

Provenance

Source

World Food Programme (WFP) using NASA MODIS collection 6.1

Collection Method

Remote sensing via Aqua and Terra satellites with administrative aggregation

Freshness

Updated as of March 2026; follows a standard 10-day dekadal reporting cycle.

Geography

Liberia