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: Β© 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:

characterSet
utf8
dataIdentification
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
characterSet
utf8
citation
dates
  • date
    2014-01-01
    dateType
    creation
otherCitationDetails
Recommended citation: Β© 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
  • keywords
    • Agricultural Drought
    • Crop growing condition
    • Early Warning System
    • Vegetatation Index
    • HiH_ASIS
    • HiH_GIEWS_OB
    type
    theme
  • keywords
    • Countries
    • Continents
    • Global
    type
    place
extent
  • temporal
    beginDate
    1984-01-01
  • geographic
    bbox
    east
    179.995536
    north
    75.0044643
    south
    -56.0044643
    west
    -180.004464
language
eng
purpose
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.
resourceConstraints
legalConstraints
otherConstraints
  • Data license policy: Creative Commons Attribution- NonCommercial-ShareAlike 3.0 IGO (CC BY-NC- SA 3.0 IGO)
useConstraints
  • license
resourceMaintenance
maintenanceAndUpdateFrequency
asNeeded
spatialRepresentationType
  • grid
status
onGoing
supplementalInformation
No data value: -9999
topicCategory
  • climatologyMeteorologyAtmosphere
  • farming
  • environment
  • geoscientificInformation
distributionFormat
  • name
    Tiff
fileIdentifier
a8a2be3f-0420-4b32-b583-17de83879713
language
eng
metadataStandardName
ISO 19115:2003/19139
metadataStandardVersion
1.0
parentIdentifier
f87f0320-d5b6-4cb5-b258-27b042952e86
referenceSystemIdentifier
EPSG:4326 - WGS84
spatialRepresentationInfo
gridSpatialRepresentation
  • dimension
    • dimensionName
      row
      dimensionSize
      14673
    • dimensionName
      column
      dimensionSize
      40320
    numberOfDimensions
    2

Options:

imported
True
imported_on
2022-05-20 12:34:23.834084
source_format
xml
source_url
https://data.apps.fao.org/map/catalog/srv/api/records/a8a2be3f-0420-4b32-b583-17de83879713/formatters/xml?approved=true
validation
True

Type:

iso

Additional Info

Field Value
Source Source URL
Last Updated August 18, 2022, 09:17 (UTC)
Created May 20, 2022, 12:34 (UTC)