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

bodemkaart

soilarea

README

BRO Soil Map of the Netherlands 1:50,000 — Soil areas (SGM)

48,025 soil-area polygons of the national Soil Map of the Netherlands 1:50,000 (Bodemkaart, SGM), enriched here with the primary soil unit and main soil class. 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: 48,025 · CRS: EPSG:28992
Bounding box (WGS84): [3.358571, 50.750579, 7.227762, 53.55359]

Schema

Column	Type	Description
fid	int64	Feature ID.
maparea_id	string	Soil-area polygon identifier.
maparea_collection	string	Survey campaign / map collection the polygon belongs to.
soilslope	string	Slope class of the soil area (mostly 'Niet opgenomen').
soilunit_code	string	Primary soil-unit code (BRO bodemcode), e.g. 'cHn21'.
hoofdklasse	string	Main soil class (mainsoilclassification), e.g. Podzolgronden, Zeekleigronden.
bodemklasse	string	Full soil classification text of the primary soil unit.
legenda_url	string	URL to the official soil-class legend entry.
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
soilarea.parquet	GeoParquet	48,025 features (EPSG:28992)
soilarea.pmtiles	PMTiles	Vector tiles for web maps
styles/	Mapbox GL v8	Visualization styles
thumbnail.png	PNG	Official PDOK preview

Quick start

1import geopandas as gpd
2gdf = gpd.read_parquet('https://data.source.coop/cholmes/portolan-nl/vro/bodemkaart/soilarea/soilarea.parquet')
1import geopandas as gpd
2gdf = gpd.read_parquet('https://data.source.coop/cholmes/portolan-nl/vro/bodemkaart/soilarea/soilarea.parquet')

Styles

styles/default — BRO Soil Map of the Netherlands 1:50,000 — Soil areas (SGM) — Default
styles/by-texture — BRO Soil Map of the Netherlands 1:50,000 — Soil areas (SGM) — By texture (sand / clay / peat)

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.