DAR Realisation of Addresses

Leaf: Addresses Dataset: DanmarksAdresser (DAR)

Description

The authoritative realisation of addresses in Denmark. DAR provides the national address register, functioning as a primary join key across other Danish registers such as the Central Business Register (CVR) and the Building and Dwelling Register (BBR).

Spatial Access Path

adresse (dwelling: floor + door)
  │  FK: adresseHarHusnummer (1..1)
  ▼
husnummer (building entrance level: "12A")
  │
  ├──► adgangspunkt (1..1)  → entrance point in terrain plane
  │       └─ position: GM_Point (ETRS89/UTM32N)
  │       └─ Use: "where is this building?" — geocoding, proximity analysis
  │
  └──► vejpunkt (1..1)      → road centreline point
          └─ position: GM_Point (ETRS89/UTM32N)
          └─ Use: network analysis, routing, snapping to road graph

3 levels of joins, 2 alternative coordinate points:

Level	Entity	Role	Cardinality
1	adresse	Dwelling-level address (etage + dør)	—
2	husnummer	Building entrance (house number on a named road)	1..1 per adresse
3a	adgangspunkt	Entrance coordinate (terrain plane)	1..1 per husnummer
3b	vejpunkt	Road centreline coordinate (for network analysis)	1..1 per husnummer

Both adgangspunkt and vejpunkt are instances of the Adressepunkt superclass, stored in the adressepunkter table. Each carries:

position — the GM_Point geometry
oprindelse — provenance and quality metadata (source, accuracy class, technical standard)

Supporting Entities

Entity	Role	Join
navngivenvej	Street name	husnummer → navngivenVej (0..1)
postnummer	Postal code area	husnummer → postnummer (1..1)
supplerendebynavn	Supplementary city name	husnummer → supplerendebynavn (0..1)

Key Attributes

Attribute	On	Description
`adressebetegnelse`	adresse	Full formatted address text
`husnummertekst`	husnummer	House number including letter suffix (“12A”)
`etage`	adresse	Floor number
`doer`	adresse	Door identifier (“tv”, “th”, “mf”, or number)
`postnr`	postnummer	4-digit postal code
`postnrnavn`	postnummer	Postal district name

Service & Access

GraphQL: adresse with joins to husnummer, adgangspunkt, vejpunkt
File Download: Bulk exports of all DAR entities
DAWA: Free API at https://api.dataforsyningen.dk/adresser

Temporal Model

Bitemporal (from Shared Temporal Superclass Contract). Address lifecycle: created → active → retired. Historical queries on virkningFra/virkningTil.

SemanticGIS DK

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