Agricultural Stress Index (ASI)
This index is an FAO indicator that highlights anomalous vegetation growth and potential drought in arable land during a given cropping season. It can be used to determine and characterize agricultural drought hazards.
Simple
- Date (Publication)
- Date
- Presentation form
- Digital map
- Purpose
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Mapping agricultural drought hazard
- Credit
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N/A
- Maintenance and update frequency
- Daily
- Update scope
- Indices
- Theme
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Type: Indices
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Type of Drought: Agricultural Drought
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Application: Mapping agricultural drought hazard
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Extent: N/A
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- Use limitation
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Vegetation Health Index (VHI)
- Access constraints
- Intellectual property rights
- Use constraints
- Other restrictions
- Date
- Spatial representation type
- Vector
Spatial resolution
- Distance
- Aggregation period: N/A
- Distance
- Spatial scale: N/A
Spatial resolution
- Metadata language
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eng
- Description
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N/A
))
- Begin date
- N/A
- End date
- N/A
- Date (Revision)
- Reference system identifier
- EPSG / Spatial_reference / 7.9
- Distribution format
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-
(
Various
)
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(
Various
)
- OnLine resource
- N/A
- Hierarchy level
- Series
- Description
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Not relevant
Temporal Extent
Vertical extent
- Dataset
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Mapping agricultural drought hazard
Non quantitative attribute accuracy
- Measure description
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N/A
- Evaluation Method
- Direct internal
Conformance result
- Date (Revision)
- Pass
Conformance result
- Date
Completeness omission
- Name of measure
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Codelist omission
- Evaluation Method
- Direct internal
Conformance result
- Date (Revision)
- Pass
- Statement
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Data requirements to use: Vegetation Health Index (VHI) ;
Data used: N/A;
Data format: N/A;
Data access: N/A;
Concise description:
The Agricultural Stress Index (ASI) is an index based on the integration of the Vegetation Health Index (VHI) in two dimensions that are critical in the assessment of a drought event in agriculture: temporal and spatial. The first step of the ASI calculation is a temporal averaging of the VHI, assessing the intensity and duration of dry periods occurring during the crop cycle at pixel level. The second step determines the spatial extent of drought events by calculating the percentage of pixels in arable areas with a VHI value below 35 percent (this value was identified as a critical threshold in assessing the extent of drought in previous research by Kogan, 1995). Finally, each administrative area is classified according to its percentage of affected area to facilitate the quick interpretation of results by analysts.
- File identifier
- f5383790-7238-4b92-836c-1167f1a5c971 XML
- Metadata language
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eng
- Character set
- UTF8
- Hierarchy level
- Indices
- Hierarchy level name
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Agricultural Stress Index (ASI)
- Date stamp
- 2022-02-07T11:04:45
- Metadata standard name
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ISO 19115:2003/19139
- Metadata standard version
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1.0
- Dataset URI
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N/A
Overviews
Spatial extent
Provided by
