Verkaufsbücher
During the Second World War, the Germans sold buildings whose owners are mostly Jewish. The administration of this is in the so-called Verkaufsbücher that the National Archives keeps. The records kept in the Verkaufsbücher contain the addresses and names of the original owners, the brokers involved and the war buyers. With the sales prices. In July 2019, a team from the National Archives and the Land Registry linked the transactions from the Verkaufsbücher to the data from the land registry addresses and buildings (BAG) of the Land Registry. As a result, these unlawful transactions are literally mapped out. The results can be seen in the online lab environment PDOK (Public Services on the Map) of the Land Registry. The Nationaal Archief uses this platform to link the linked data to (the aggregated) BAG data held by the Land Registry.
Trust score
How is this computed?Composite of 5 axes from our methodology (proof-based officialness, live verification, metadata completeness, license clarity, agent readiness).
- Officialnessweight 25%50/100
Not public-sector → neutral score; not subject to the proof checker.
- Availabilityweight 25%55/100
Verification has failed 0 consecutive times.
- Metadata completenessweight 20%50/100
5 of 10 recommended metadata fields populated.
- License clarityweight 15%50/100
License info not yet tracked for APIs (datasets only).
- Agent readinessweight 15%20/100
Spec format known (rest) · Topic tags assigned
Data access
This entry links to a dataset, file download, or documentation page rather than a self-describing API, so there's no field schema to display.
Verification Status
Using the API
Configuration
- Base URL
- https://api.labs.kadaster.nl
- Format
- rest
Query examples
curl -s 'https://api.labs.kadaster.nl' -H 'Accept: application/json'Base API endpoint — see the documentation for available routes.