A collection of datasets from various Dutch institutions to demonstrate a Spatial Data Infrastructure built on Portolan.
Two nature conservation collections from RVO. Although RVO is primarily a business and subsidy agency, it also manages the spatial data for the Dutch protected areas system — both the national designation (Nationale Parken) and the EU designation (Natura 2000).
All 21 National Parks in the Netherlands — large contiguous natural areas designated for their ecological, landscape, and recreational value. Parks range from coastal dunes to forests, wetlands, heathlands, and a tidal estuary (Oosterschelde, the largest at ~38,000 ha).
nationale_parken.parquet (~800 KB, 21 features)naam (name), hectares (area), datum (designation date), geometry (boundary)162 Natura 2000 EU-protected areas (209 features) designated under the EU Birds Directive and Habitats Directive. These carry the strongest nature protection in Dutch law — any plan or project that may significantly affect a Natura 2000 area requires an appropriate assessment. Politically critical due to the Dutch nitrogen crisis (stikstofcrisis).
natura2000.parquet (~7.5 MB, 209 features)naam_n2k (name), nr (official number), beschermin (designation type: VR/HR/VR+HR), shape_area (area in m2)COUNT(DISTINCT nr) for area counts.These are two separate legal protection systems with significant spatial overlap:
Many National Parks overlap wholly or partially with Natura 2000 areas. For example, De Biesbosch, Schiermonnikoog, and Oosterschelde are both National Parks and Natura 2000 sites. However, the boundaries do not always match exactly, and the legal consequences of each designation differ.
Each collection has its own AGENTS.md with detailed field descriptions and query patterns:
nationale_parken/AGENTS.mdnatura2000/AGENTS.mdHand-maintained agent guide (ported from this collection's llms.txt in August 2026). Update it alongside collection.json.