A collection of datasets from various Dutch institutions to demonstrate a Spatial Data Infrastructure built on Portolan.
80,148 landform polygons of the national Geomorphological Map of the Netherlands 1:50,000 (Geomorfologische kaart, GMM), classified by genesis, relief and landform subgroup. Produced under VRO; bronhouder Wageningen Environmental Research.
AI/Agent users: see llms.txt for field meanings, query examples and caveats.
styles/default — BRO Geomorphological Map 1:50,000 — Geomorphological areas (GMM) — Defaultstyles/by-relief — BRO Geomorphological Map 1:50,000 — Geomorphological areas (GMM) — By relief classPDOK — Basisregistratie Ondergrond (BRO). Provider: Ministerie van Volkshuisvesting en Ruimtelijke Ordening (VRO). Bronhouder: TNO – Geologische Dienst Nederland / Wageningen Environmental Research.
CC0-1.0 — public domain.
Part of Portolan NL · generated from STAC metadata.
| int64 |
| genese_validto | int64 |
| landform_subgroup_description | string | Landform subgroup description (Dutch). |
| landform_subgroup_url | string | URL to the landform legend entry. |
| landform_subgroup_validfrom | int64 |
| landform_subgroup_validto | int64 |
| additional_surface_relief_description | string |
| additional_surface_relief_validfrom | int64 |
| additional_surface_relief_validto | int64 |
| additional_surface_cover_description | string |
| additional_surface_cover_validfrom | int64 |
| additional_surface_cover_validto | int64 |
| relief_klasse | string |
| relief_subklasse | string |
| helling | string |
| lokaal_maximaal_hoogteverschil | string |
| diepte_tov_omgeving | string |
| steilste_verhang | string |
| maximaal_hoogteverschil | string |
| maximaal_verval | string |
| relief_validfrom | int64 |
| relief_validto | int64 |
| 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. |