10622/URI8O2 Zijdeman, Richard0000-0003-3902-3720(International Institute of Social History)Mac Gillavry, Edward(Webmapper) IISH Data Collection 2020 This dataset contains the boundaries of Dutch municipalities since 1812, including their names, Amsterdam Code and CBS code. Also the year in which the polygon was observed is included, for easy matching. The files are presented as geojson, that can easily be viewed via for example QGIS, Python and R. Zijdeman, Richard(International Institute of Social History)