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API: CShapes Dataset of Historical Country Boundaries

https://demo.ldproxy.net/cshapes

Scope

Borders of independent states and dependent territories from 1886 to 2019.

Resource types: Features

Notes

Each boundary feature is associated with a time interval in which the boundaries were valid. For example, to select the boundaries at January 1, 1980, use the query parameter datetime=1980-01-01 (request).

Data source

License: Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0)

Attribution: Schvitz, Guy, Seraina Rüegger, Luc Girardin, Lars-Erik Cederman, Nils Weidmann, and Kristian Skrede Gleditsch. 2022. Mapping The International System, 1886-2017: The CShapes 2.0 Dataset. Journal of Conflict Resolution 66(1): 144–61.

The commands to generate the GeoPackage used as the feature provider:

curl "https://icr.ethz.ch/data/cshapes/CShapes-2.0.zip" -o CShapes-2.0.zip
unzip CShapes-2.0.zip
ogr2ogr -f "GPKG" CShapes-2.0.gpkg CShapes-2.0/CShapes-2.0.shp -oo encoding="ISO-8859-1" -nlt MULTIPOLYGON -wrapdateline -nln CShapes

Tools:

  • curl
  • ogr2ogr
  • a tool to extract files from a ZIP archive