-
downloaded the shp files from http://www.cbs.nl/nl-NL/menu/themas/dossiers/nederland-regionaal/publicaties/geografische-data/archief/2015/wijk-en-buurtkaart-2014-art.htm
-
Worked on the command line with ogr2ogr*:
-
ogr2ogr -f "ESRI Shapefile" source_maps/wgs84.shp source_maps/shape-2014-versie-1.0/gem_2014.shp -s_srs EPSG:28992 -t_srs EPSG:4326
-
ogr2ogr -f "GeoJSON" -lco COORDINATE_PRECISION=6 source_maps/wgs84.geojson source_maps/wgs84.shp
- Simplified it to ~1% in mapshaper.org