• Shape files infrastructure and nature (railway, roads, water, forest): all originally by OpenStreetMap contributors. Status december 2011
• BAG woonplaats (2012) and municipality (2012) boundaries: shapefiles derived via imergis.nl. Re-use policy: CC-BY-SA3 , credit: Jan-Willem van Aalst - www.imergis.nl. Note that original BAG data is public and can be used by anyone.
• Additional data for landuse: OSM / Corine land cover, 2006 (eea.europa.eu)
• Mentioned sources combined and exported using a script by Michiel1972