WFS API

From the dataset abstract

The regional address catalogue contains information about the addresses and place names of properties and plan units located in the area (so-called zero address). The information in the regional address catalogue is produced by the cities of Helsinki, Espoo, Vantaa and Kauniainen.

The addresses are based on address decisions and the place names on the plan nomenclature. The catalogue also contains address information of public services, sights and rail traffic stations in Helsinki. The addresses are maintained on a database basis and constantly updated based on address decisions and city planning.

When using the data, it must be taken into account that the dataset includes addresses of properties and plan units but not the addresses of buildings. Based on the dataset, it is not possible to create postal addresses for buildings because the staircase letters needed for building addresses are missing from the data.

The dataset also includes the postal code and city.

The data is available for download in several formats, including JSON, KML, CSV, Esri Shape, and XML. Available formats can always be found under OutputFormat in the GetCapabilities query for the service. Additional information can be found here (in Finnish)

Coordinate systems:

• Maintained in ETRS-GK25 (EPSG:3879), can be projected to other coordinate systems. See GetCapabilities query for other possible coordinate systems.

Layers

• PKS_osoiteluettelo

Helsinki Metropolitan Area address catalogue: attributes, data types and their explanation and reliability data in information services:

• id (int). Unique identifier of the feature. Reliable, comprehensively existing information.
• katunimi (string). Name of the street address in Finnish. Reliable, comprehensively existing information.
• gatan (string). Name of the street address in Swedish. Reliable, comprehensively existing information.
• osoitenumero (short). Address number. Reliable, comprehensively existing information.
• osoitenumero2 (short). Latter digit of the two-part address number. Reliable, comprehensively existing information.
• osoitekirjain (string). Address letter associated with the address number. Reliable, comprehensively existing information.
• n (int). N coordinate (ETRS-GK25, EPSG:3879). Reliable, comprehensively existing information.
• e (int). E coordinate (ETRS-GK25, EPSG:3879). Reliable, comprehensively existing information.
• kaupunki (string). Finnish name of the city where the address is located. Reliable, comprehensively existing information.
• staden (string). Swedish name of the city where the address is located. Reliable, comprehensively existing information.
• tyyppi (short). Type of address. Reliable, comprehensively existing information.
• osoitenumero_teksti (string). Assembled address number. Reliable, comprehensively existing information.
• postinumero (string). Identification of the postal code area. Reliable, comprehensively existing information.
• postitoimipaikka (string). Name of the city in Finnish. Reliable, comprehensively existing information.
• datanomistaja (string). Data owner. Reliable, comprehensively existing information.
• paivitetty_tietopalveluun (date). Information service record date (yyyy-mm-dd). Reliable, comprehensively existing information.
• geom(GeometryPropertyType). Geometry of the feature.

Key to the tyyppi attribute:

• 1 address or street
• 2 park or field
• 3 other
• 4 operating point
• 5 city district
• 6 island
• 7 bridge
• 8 sports facility
• 9 marketplace or square
• 10 cemetery
• 11 beach
• 12 harbour
• 13 allotment garden or cottage village
• 14 nature reserve
• 15 tourist attraction
• 16 quarter or part of quarter
• 17 terrain name
• 18 name of water body
• 19 junction or crossing
• 20 building
• 21 district
• 22 city sub-district

There are all types of data for Helsinki and only type 1 for other municipalities.

The key to the tyyppi attribute does not apply to the layer Helsinki_osoitteet_rakennukset. The key to the osoitetyyppi attribute at that layer is the following:

• 1 primary address
• 2 parallel address

Source: Pääkaupunkiseudun osoiteluettelo