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

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.

𝑉𝐢𝐼𝑖=(π‘π·π‘‰πΌπ‘–βˆ’π‘π·π‘‰πΌπ‘šπ‘–π‘›) / (π‘π·π‘‰πΌπ‘šπ‘Žπ‘₯βˆ’π‘π·π‘‰πΌπ‘šπ‘–π‘›)

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: https://www.fao.org/giews/earthobservation/index.jsp?lang=en

Data creation: 2014-01-01

Supplemental Information:

No data value: -9999

Citation:

Recommended citation: @ FAO - Agricultural Stress Index System (ASIS), http://www.fao.org/giews/earthobservation/, [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

Graphic overview

Metadata:

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abstract
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. 𝑉𝐢𝐼𝑖=(π‘π·π‘‰πΌπ‘–βˆ’π‘π·π‘‰πΌπ‘šπ‘–π‘›) / (π‘π·π‘‰πΌπ‘šπ‘Žπ‘₯βˆ’π‘π·π‘‰πΌπ‘šπ‘–π‘›) Together with Temperature Condition Index (TCI), Vegetation Condition Index (VCI) is used to calculate Vegetation Health Index (VHI) using formula: VHI=0.5*VCI+0.5*TCI 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: https://www.fao.org/giews/earthobservation/index.jsp?lang=en
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**Recommended citation**: @ FAO - Agricultural Stress Index System (ASIS), http://www.fao.org/giews/earthobservation/, [Date accessed]
title
Vegetation Condition Index (VCI) - Monthly Summary (Global - Monthly - 1 Km)
descriptiveKeywords
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    • Agricultural Drought
    • Crop growing condition
    • Early Warning System
    • Vegetatation Index
    • HiH_ASIS
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FAO Global Information and Early Warning System on Food and Agriculture (GIEWS) monitors the condition of major foodcrops across the globe to assess production prospects. To support the analysis and supplement ground-based information, GIEWS utilizes remote sensing data that can provide a valuable insight on water availability and vegetation health during the cropping seasons. In addition to rainfall estimates and the Normalized Difference Vegetation Index (NDVI), GIEWS and FAO's CBC Division have developed the Agricultural Stress Index (ASI), a quick-look indicator for the early identification of agricultural areas probably affected by dry spells, or drought in extreme cases. The ASI dissemination system was online in 2014.
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2022-05-20 12:34:23.834084
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Type:

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Additional Info

Field Value
Source Source URL
Last Updated April 26, 2023, 07:18 (UTC)
Created May 20, 2022, 12:34 (UTC)