Vegetation Condition Index (VCI) - Monthly Summary (Global - Monthly - 1 Km) - ASIS

The Vegetation Condition Index (VCI) evaluates the current vegetation health in comparison to the historical trends. The VCI relates current dekadal Normalized Difference Vegetation Index (NDVI) to its long-term minimum and maximum, normalized by the historical range of NDVI values for the same dekad. The VCI was designed to separate the weather-related component of the NDVI from the ecological element.

𝑉𝐶𝐼𝑖=(𝑁𝐷𝑉𝐼𝑖−𝑁𝐷𝑉𝐼𝑚𝑖𝑛) / (𝑁𝐷𝑉𝐼𝑚𝑎𝑥−𝑁𝐷𝑉𝐼𝑚𝑖𝑛)

Together with Temperature Condition Index (TCI), Vegetation Condition Index (VCI) is used to calculate Vegetation Health Index (VHI) using formula: VHI=0.5VCI+0.5TCI

In ASIS, VCI is computed in two modality: dekadal and monthly. The dekadal/monthly VCI raster layer published in Hand in Hand Geospatial platform is further updated in the following 5 dekads (improve data precision, remove cloud pixel etc.).

Flags of raster file: 251=missing, 252=cloud, 253=snow, 254=sea, 255=background

More information, please visit FAO GIEWS Earth Observation website:

Data creation: 2014-01-01

Supplemental Information:

No data value: -9999


Recommended citation: © FAO - Agricultural Stress Index System (ASIS),, [Date accessed]

Contact points:

Resource Contact: Yanyun Li

Metadata Contact: Global Information and Early Warning System (GIEWS)

Resource constraints:

Data license policy: Creative Commons Attribution- NonCommercial-ShareAlike 3.0 IGO (CC BY-NC- SA 3.0 IGO)

Online resources:

Global Vegetation Condition Index monthly map

Data and Resources

Additional Info

Field Value
Last Updated June 17, 2022, 23:32 (CDT)
Created May 20, 2022, 22:49 (CDT)
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