The apparent green cover is a parameter for vegetation
cover that was specifically designed for desert locust monitoring and
that can be used for topics like food security, desertification, ...
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The product was conceived in first place to catch
start of vegetation growth in arid regions, to support desert locust monitoring
activities. Vegetation cover to be identified can be lower than 5% in
average over the whole pixel surface and detection must be insensitive
to soil effect. The product is used as an input for the "start of growing
season" GEOLAND-OLF product.
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The product can also be used for year-to-year comparison
of vegetation status in arid and semi-arid areas. The product is based
on an empirical transformation of the NDVI into apparent fractional cover.
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The Desert Locust metholology is used by FAO, this
information is given at http://www.fao.org/NEWS/GLOBAL/locusts/locuhome.htm.
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Available products:
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original data in standard format (HDF) and fixed ROI (Sahel)
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original data in custom format (HDF, ENVI) and user-defined ROI
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difference map in custom format (HDF, ENVI) and user-defined ROI
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Product Specifications
Input
Output
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region: arid and semi-arid regions in northern Africa
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period: near real time
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frequency: every 10 days
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type: raster
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resolution: 1 km x 1 km
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format: simple byte array, HDF/ENVI
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size: ± 50 Mb
compressed: ± 10,5 Mb
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units: %
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© JRC
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