Free map (basic layers). Unlock premium with an API key for POIs, administrative boundaries, aeroway, energy labels, air quality and heritage layers.

Most important shown first, more detail as you zoom in.

Address + energy label (Kadaster BAG / EP-Online), per address, from a regional zoom level.

RIVM Grootschalige Concentratiekaarten Nederland (GCN), 1km grid, annual average µg/m³.

Churches (OSM), rijksmonumenten (RCE/PDOK) and old buildings (BAG, built before 1940).

Population density (CBS Wijk- en Buurtkaart via PDOK). Each level shows at its own zoom range - toggle independently.

Provinces, water authorities and Natura 2000 nature reserves (Kadaster/PDOK).

Postcode4 statistics (CBS via PDOK): population, income, home values.

Official Kadaster building outlines (BAG), as an alternative to OSM buildings - off by default since it overlaps the base map's own building layer.