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GADM, the Database of Global Administrative Areas, is a high-resolution database of country administrative areas, with a goal of "all countries, at all levels, at any time period." The database has a few export formats, including shapefiles that are used in most common GIS applications. Files formatted for the programming language R are also available, allowing the easy creation of descriptive data plots that include geographical maps. Although it is a public database, GADM has a higher spatial resolution than other free databases, and also higher than commercial software such as ArcGIS.

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  • Global Administrative Areas
  • GADM
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  • Global Administrative Areas ou GADM est une base de données des contours vectoriels des frontières administratives. Le projet est développé par Robert Hijmans de l'université de Californie à Berkeley. Les données sont géoréférencées au format WGS 84.
  • GADM, the Database of Global Administrative Areas, is a high-resolution database of country administrative areas, with a goal of "all countries, at all levels, at any time period." The database has a few export formats, including shapefiles that are used in most common GIS applications. Files formatted for the programming language R are also available, allowing the easy creation of descriptive data plots that include geographical maps. Although it is a public database, GADM has a higher spatial resolution than other free databases, and also higher than commercial software such as ArcGIS.
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  • Global Administrative Areas ou GADM est une base de données des contours vectoriels des frontières administratives. Le projet est développé par Robert Hijmans de l'université de Californie à Berkeley. Les données sont géoréférencées au format WGS 84.
  • GADM, the Database of Global Administrative Areas, is a high-resolution database of country administrative areas, with a goal of "all countries, at all levels, at any time period." The database has a few export formats, including shapefiles that are used in most common GIS applications. Files formatted for the programming language R are also available, allowing the easy creation of descriptive data plots that include geographical maps. Although it is a public database, GADM has a higher spatial resolution than other free databases, and also higher than commercial software such as ArcGIS. GADM is not freely available for commercial use. The GADM project created the spatial data for many countries from spatial databases provided by national governments, NGO, and/or from maps and lists of names available on the Internet (e.g. from Wikipedia). The GADM website and data repository is hosted at UC Davis in the Hijmans Lab. The Hijman lab is run by Robert Hijmans an Environmental Science and Policy faculty member in the Geography Graduate Group.
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