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Update of the Digital Global Map of Irrigation Areas (GMIA) to Version 5

Year of publication 2013

Place of publication Rome, Italy ;

Pages 171

Publisher FAO ;

Product type Document

Edition 1

Synopsis (short abstract) This report describes the update of the Digital Global Map of Irrigation Areas to version 5. For this update, the inventory of subnational irrigation statistics was updated with new information derived from national census surveys or irrigation sector studies. For the first time, the global map of irrigation areas also contains data layers on the percentage of area equipped for irrigation that is actually irrigated and on the source of irrigation water: groundwater, surface water, water from non-conventional sources.

Language English

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    Irrigation in Africa, Europe and Latin America - Update of the digital global map of irrigation areas to Version 4  2006
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    The first version of the Digital Global Map of Irrigated Areas was published in 1999. It consisted of a raster map with a resolution of 0.5° by 0.5° containing the percentage of the area that was equipped for irrigation around 1995, the so-called irrigation density. For Version 2, updated maps of Latin America, Europe, Africa and Oceania have been published in 2002. With the update to version 3 in 2005 the map for the whole globe was generated by using the same methodology. In the present report, the update to version 4 in 2006 is presented which incorporates improvements for the continents of Africa and Europe and for parts of Latin America as well.
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    Poster showing version 4 of the Digital Global Map of irrigation areas (GMIA) 2006
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    This poster displays the version 4 of the Global Map of Irrigated Areas and it also briefly details the data and methods used for its compilation. The poster was presented by the Frankfurt University and the Food and Agriculture Organization of the United Nations at the International Workshop on Global Irrigated Area Mapping held 25 - 26 September 2006 in Colombo, Sri Lanka, and at the Tropentag Conference 2006 held in Bonn, Germany.
  • Thumbnail Image
    Book (stand-alone)
    A Digital Global Map of Irrigated Areas - An update for Latin America and Europe (Report N. 4) 2001
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    This report describes an update of the Digital Global Map of Irrigated Areas for Latin America and Europe. The map depicts the percentage of each 0.5˚ by 0.5˚ cell that was equipped for irrigation in 1995. The first version of the map has been updated and improved for Latin America (including the Caribbean) and Europe, based on 1) new information from FAO's AQUASTAT and FAOSTAT, 20 national data on irrigation in sub-national units, 3) geographic information on the location and extent of irrigated areas and 4) the European land cover map CORINE. The total irrigated area per country has changed considerably in many countries, especially in Latin America where the information acquired by FAO for the new AQUASTAT report is now included. In total, irrigated areas has increased by 0.4% in Latin America as compared to the first version of the map, while it has decreased by 4.5% in Europe. Compared to the first version of the map, the spatial resolution of the input data is much higher, and the new maps show a more disperse irrigation. This documentation also describes the data sources and the generation process of the new maps for Latin America and Europe, and discusses the map quality. Publication details: Kassel World Water Series 4, Center for Environmental Systems Research, University of Kassel, Germany, 14 pp + Appendix.
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