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Global map of irrigation areas

Identification info

Title

Date

2007-03-15

Date type

Revision: Date identifies when the resource was examined or re-examined and improved or amended

Edition

Version 4.0.1

Presentation form

Digital map: Map represented in raster or vector form

Abstract

Grid with percentage of area equiped for irrigation with a spatial resolution of 5 arc minutes or 0.083333 decimal degrees. This dataset is developed in the framework of the AQUASTAT - programme of the Land and Water Development Division of the Food and Agriculture Organization of the United Nations and the Johann Wolfgang Goethe Universität, Frankfurt am Main, Germany. The map shows the amount of area equiped for irrigation at the end of the 20th century as a percentage of the total area on a raster with a resolution of 5 minutes. The area actually irrigated was smaller, but is unknown for most countries. A special note has to be made for Australia where the map shows the total area actually irrigated. This is due to the fact that statistics collected in Australia refer to actually irrigated area as opposed to statistics with area equiped for irrigation which are collected in most other countries. Due to the map generation method, the quality of the map can never be uniform. The overall quality of the map depends heavily on the individual quality of the data for the different countries.

Purpose

This dataset is generally used in GIS-based water balance model calculations to assess water use by irrigated agriculture.

Status

On going: Data is continually being updated

Descriptive keywords

irrigation , irrigated areas , irrigated agriculture , hydrology , AQUASTAT , AQUAMAPS_infrastructure (theme).

Descriptive keywords

World (place).

Language

English

Character set

UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646

Topic category code

Farming

Extent

Temporal Extent

Begin date	1990
End date	2000

Extent

Geographic bounding box

WGS 84

	North bound
West bound	Polygon((-180 -90,180 -90,180 90,-180 90,-180 -90))	East bound
	South bound

Supplemental Information

The map is generated as a grid with a cellsize of 5 arc minutes. For the GIS-users the map is distributed in two different formats: as a zipped ASCII-grid that can be easily imported in most GIS-software that support rasters or grids; and, to accomodate people who use GIS-software that doesn't support rasters or grids, as a zipped ESRI shape file. The non-GIS-users can download the map as PDF-file in two different resolutions. Users are requested to refer to the map as follows: "Stefan Siebert, Petra Döll, Sebastian Feick, Jippe Hoogeveen and Karen Frenken (2007) Global Map of Irrigation Areas version 4.0.1. Johann Wolfgang Goethe University, Frankfurt am Main, Germany / Food and Agriculture Organization of the United Nations, Rome, Italy".

Distribution Information

Download Summary

Transfer options

OnLine resource	Online link to the 'Global map of irrigated areas'- website
Interactive Map	Global map of irrigation areas (OGC-WMS Server: http://data.fao.org/maps/wms?styles=aquamaps_gmia_v4_0_1_pct_5020_style )
View in Google Earth	Global map of irrigation areas
Data for download	Global Map of Irrigated Areas - version 4.0.1 - area equipped for irrigation expressed as percentage of total area (2 354 kB) (ASCII-grid, available since 16/2/2007)
Data for download	Global Map of Irrigated Areas - version 4.0.1 - area equipped for irrigation expressed in hectares per cell (2 316 kB) (ASCII-grid, available since 16/2/2007)
OnLine resource	On-line link to the AQUASTAT- website
Data for download	Global Map of Irrigated Areas - version 4.0.1 (12 220 kB - ESRI shape file) (available since 16/2/2007)
Data for download	Global Map of Irrigated Areas - version 4.0.1 (5 399 kB - A1 PDF-file) (available since 16/2/2007)
Data for download	Global Map of Irrigated Areas - version 4.0.1 (2 465 kB - A3 PDF-file) (available since 16/2/2007)
OnLine resource	On-line interactive map

Spatial representation info

Number of dimensions

Dimension name

Row: Ordinate (y) axis

Dimension size

2160

Resolution

Units of measure

Decimal Degree,

Resolution

0.0833

Dimension name

Column: Abscissa (x) axis

Dimension size

4320

Resolution

Units of measure

Decimal Degree,

Resolution

0.0833

Cell geometry

Area: Each cell represents an area

Transformation parameter availability

false

Metadata

File identifier

f79213a0-88fd-11da-a88f-000d939bc5d8

Metadata language

English

Character set

UTF8: 8-bit variable size UCS Transfer Format, based on ISO/IEC 10646

Date stamp

2013-01-09T10:30:04

Metadata standard name

ISO 19115:2003/19139

Metadata standard version

1.0

Maintenance and update frequency

As needed: Data is updated as deemed necessary

Contact

Individual name	Jippe Hoogeveen
Organisation name	FAO-UN
Position name	Water Resources Officer
Role	Point of contact: Party who can be contacted for acquiring knowledge about or acquisition of the resource

Delivery point	Viale delle Terme di Caracalla
City	Rome
Postal code	00100
Country	Italy
Electronic mail address	jippe.hoogeveen@fao.org