Bulgaria Subnational NDVI: Dekadal Vegetation Indices and Anomalies

Giving access to dekadal (10-day) Normalized Difference Vegetation Index (NDVI) indicators for Bulgaria, aggregated by sub-national administrative units using NASA MODIS collection 6.1 satellite data. Produced by the World Food Programme, the records track vegetation health through current values, long-term averages, and percentage anomalies. The data is updated through March 2026 and utilizes WFP-standardized administrative boundaries.

Use Cases

• Monitoring agricultural health by comparing vim against vim_lta to identify drought conditions
• Analyzing regional climate trends using the viq anomaly percentage over multiple dekads
• Validating land-use models by correlating n_pixels with administrative area coverage

Strengths

• Uses NASA MODIS collection 6.1 high-quality satellite imagery
• Includes Pcode references for standardized geospatial joining
• Provides n_pixels to indicate the statistical weight and reliability of each aggregate

Limitations

• Aggregated at the sub-national level, which masks local-scale vegetation variations
• Accuracy is dependent on cloud-free satellite observations for the underlying pixel counts

Provenance

Source

NASA Moderate Resolution Imaging Spectroradiometer (MODIS) collection 6.1 (Aqua and Terra)

Collection Method

Satellite sensor data aggregation by sub-national administrative units

Freshness

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

Geography

Bulgaria