A collection of datasets from various Dutch institutions to demonstrate a Spatial Data Infrastructure built on Portolan.
One collection from the RCE, the Dutch national agency for cultural heritage. The RCE advises the government on heritage policy, maintains the national monument register, and manages heritage data infrastructure.
63,073 nationally listed monuments (rijksmonumenten) — buildings, objects, and sites protected under the Heritage Act (Erfgoedwet, 2016; successor to the Monumentenwet 1988). National monument designation means the owner must obtain a permit for modifications, and demolition is generally prohibited.
rijksmonumenten.parquet (3.7 MB)rijksmonum (monument number), hoofdcateg (main category), subcategor (subcategory), rijksurl (register link)Monuments are classified into 13 hoofdcategorien with 66 subcategories:
Half of all monuments are residential buildings. 22% belong to a "complex" — an ensemble of related monuments (e.g., a church with its rectory).
Every monument has a direct URL to its register page:
https://monumentenregister.cultureelerfgoed.nl/monumenten/{nummer}
The rijksurl field in the data contains this link. The register page shows the full
description, photos, legal status, and complex membership.
The Erfgoedwet (2016) replaced the Monumentenwet 1988 and consolidated several heritage laws. Under the Act:
This dataset only covers national monuments (rijksmonumenten).
The rijksmonumenten/AGENTS.md file has detailed field descriptions, location quality notes,
complex groupings, and more query patterns.
Hand-maintained agent guide (ported from this collection's llms.txt in August 2026). Update it alongside collection.json.
| Cemeteries |
| 929 |
| Bestuursgebouwen, rechtsgebouwen en overheidsgebouwen | Government buildings | 724 |
| Sport, recreatie, vereniging en horeca | Sports, recreation, hospitality | 541 |