IGADD Member Countries Crop types and distribution by administrative units, 1987
Entry ID:
NBId0207_101
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Summary
The IGADD (Inter-Governmental Authority on Drought and Development) crop zones dataset is part of the Africa UNEP/FAO/ESRI Crops Data. The maps were prepared by Environmental Systems Research Institute (ESRI), USA. The data was provided by Food and Agriculture Organization (FAO), the Soil Resources, Management and Conservation Service, Land and Water ... Development Division, Italy. The datasets were then developed in collaboration with the United Nations Environment Program (UNEP), Kenya. The base maps used were the UNESCO/FAO Soil Map of the world (1977) in Miller Oblated Stereographic projection, the Administrative Units map and the World Atlas of Agriculture (1969). All sources were re-registered to the base map by comparing known features on the base map and the source maps. In the original Database (Africa), a considerable study was made of crop water requirements for a range of crops in the various African climates during the time of the year when irrigation would be required. It was found that a relatively simple relationship exists between annual rainfall and the crop irrigation water requirements for the African food grain crops. It was also observed that water requirements for food grains vary between fruit and vegetable crops on the one side and fiber crops and fodder on the other. No attempt was made to produce complex crop patterns. There is a maximum of 13 crop types in one country. References: ESRI. Final Report UNEP/FAO world and Africa GIS data base (1984). Internal Publication by ESRI, FAO and UNEP FAO/UNESCO Soil Map of the Africa (1977). Scale 1:5000000. UNESCO, Paris. FAO. Administration units map. Scale 1:5 000 000. Rome. FAO. Irrigation and Water Resources Potential for Africa. (1987) Source :UNESCO/FAO Soil Map of the World. Scale 1:5000000 Publication Date :Nov 1987 Projection :Miller Type :Polygon Format :Arc/Info Export non-compressed Related Data sets :All UNEP/FAO/ESRI Data sets FAO Irrigable Data sets 100050: " IRRIGLB lowland crops, best soils " IRRIGLT lowland crops, best plus suitable soils " IRRIGUB upland crops, best soils " IRRIGUT upland crops, best plus suitable soils FAO Soil water balance 100053: " WATBALLB lowland crops, best soils " WATBALLT lowland crops, best plus suitable soils " WATBALUB upland crops, best soils " WATBALUT upland crops, best plus suitable soils FAO Agro-ecological zones AEZBLL08 North-west of continent AEZBLL09 North-east of continent AEZBLL10 South of continent
Geographic Coverage
Spatial coordinates
N: 23.0 |
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S: -12.0 |
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E: 51.0 |
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W: 22.0 |
Location Keywords
Science Keywords
ISO Topic Category
Access Constraints
Public
Ancillary Keywords
Originating Center
Data Center
Personnel
MARIO
HERNANDEZ
Role:
TECHNICAL CONTACT
Phone:
(254)-2-62.12.34
Fax:
(254)-2-62.43.15
Email:
mario.hernandez at unep.org
Contact Address:
UNEP-GRID, Nairobi, Kenya
P.O. Box 30552
City:
Nairobi
Country:
Kenya
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Creation and Review Dates
Last DIF Revision Date:
2005-06-14
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