GADM (original) (raw)
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Database of administrative boundaries
 Level 1 administrative divisions of Germany, created from GADM data |
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|---|---|
| Original author(s) | Robert J. Hijmans |
| Initial release | 2009; 15 years ago (2009) |
| Stable release | 4.1 / 16 July 2022; 2 years ago (2022-07-16)[1] |
| Written in | GeoPackage |
| Type | Geographic Information Systems, Data visualization |
| License | Copyrighted with academic friendly policy |
| Website | gadm.org |
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."[2] Although it is a public database, GADM has a higher spatial resolution than other free databases,[3] and also higher than commercial software such as ArcGIS.[4] Those sources are commonly use to complete data analysis with data visualisation such as data plots, choropleth map, etc.[5][6]
The database is available in a few export formats, including shapefiles that are used in most common GIS applications.[7] Files for use with the data analysis language R are also available.
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).
- ^ "GADM data". Gadm.org. Retrieved March 23, 2023.
- ^ Main GADM website
- ^ Free Geography Tools website
- ^ Kelly Center blog
- ^ chloropleth map of deforestation in Africa
- ^ Swiss canton languages
- ^ Marine Life Mapping & Visualisation