Dutch Portolan Demo

A collection of datasets from various Dutch institutions to demonstrate a Spatial Data Infrastructure built on Portolan.

Product Details

Visibility: Public
Owner: Chris Holmes
Created: 6 May 2026
Last Updated: 6 May 2026

Product Contents

root

vro

geomorfologische_kaart

geomorphological_area_collection

README.md

Name: README.md
Size: 2.26 KB
Content Type: binary/octet-stream
Last Modified: 7 Jun 2026
Source URL: https://data.source.coop/cholmes/portolan-nl/vro/geomorfologische_kaart/geomorphological_area_collection/README.md
Cloud URI: s3://us-west-2.opendata.source.coop/cholmes/portolan-nl/vro/geomorfologische_kaart/geomorphological_area_collection/README.md

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Name: README.md
Size: 2.26 KB
Content Type: binary/octet-stream
Last Modified: 7 Jun 2026
Source URL: https://data.source.coop/cholmes/portolan-nl/vro/geomorfologische_kaart/geomorphological_area_collection/README.md
Cloud URI: s3://us-west-2.opendata.source.coop/cholmes/portolan-nl/vro/geomorfologische_kaart/geomorphological_area_collection/README.md

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BRO Geomorphological Map — Map area collections

70 map-area collection polygons grouping the national Geomorphological Map 1:50,000 (GMM) by survey/publication. Produced under VRO; bronhouder Wageningen Environmental Research.

AI/Agent users: see llms.txt for field meanings, query examples and caveats.

Spatial coverage

Geometry: MultiPolygon · Features: 70 · CRS: EPSG:28992
Bounding box (WGS84): [3.242611, 50.737537, 7.23837, 53.596828]

Schema

Column	Type	Description
fid	int64	Feature ID.
version	string
collection_id	string
name	string
inventorymethod	string
source	string
beginlifespan	int64
endlifespan	int64
citation_id	string
geom	binary	Feature geometry (WKB) in EPSG:28992 (Amersfoort / RD New).
geom_bbox	struct<xmin: float, ymin: float, xmax: float, ymax: float>	Per-feature bounding box struct for spatial filtering.

Files

File	Format	Description
geomorphological_area_collection.parquet	GeoParquet	70 features (EPSG:28992)
geomorphological_area_collection.pmtiles	PMTiles	Vector tiles for web maps
styles/	Mapbox GL v8	Visualization styles
thumbnail.png	PNG	Official PDOK preview

Quick start

Styles

styles/default — BRO Geomorphological Map — Map area collections — Default

Source

PDOK — Basisregistratie Ondergrond (BRO). Provider: Ministerie van Volkshuisvesting en Ruimtelijke Ordening (VRO). Bronhouder: TNO – Geologische Dienst Nederland / Wageningen Environmental Research.

License

CC0-1.0 — public domain.

Part of Portolan NL · generated from STAC metadata.