GADM

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]

GADM
Level 1 administrative divisions of Germany, created from GADM data
Original author(s)Robert J. Hijmans
Initial release2009 (2009)
Stable release
3.6 / 6 May 2018 (2018-05-06)[1]
Written inshapefile
TypeGeographic Information Systems, Data visualization
LicenseCopyrighted with academic friendly policy
Websitegadm.org

The database is available in a few export formats, including shapefiles that are used in most common GIS applications.[3] Files for use with the data analysis language R are also available.

The files allow for data analysis as well as the easy creation of descriptive data plots that include geographical maps.[4][5]

Although it is a public database, GADM has a higher spatial resolution than other free databases,[6] and also higher than commercial software such as ArcGIS.[7]

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).

See also

References
  1. "GADM data". Gadm.org. Retrieved May 18, 2018.
  2. Main GADM website
  3. Marine Life Mapping & Visualisation
  4. chloropleth map of deforestation in Africa
  5. Swiss canton languages
  6. Free Geography Tools website
  7. Kelly Center blog
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