WFS API

From the dataset abstract

The dataset includes the up-to-date partition of real estate in the administrative area of the City of Helsinki and a limited set of attributes extracted from the municipal register.

The following attributes have been published about the register units: ID, property identifier, municipality, location area, group, unit, property registration date, creation date of the feature, last modification date of the feature, owner of the data, information service recording date.

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.

Administrator: City of Helsinki, Urban environment division, City survey services

Previewing the data in the kartta.hel.fi service:

• kartta.hel.fi

Coordinate systems:

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

Elevation system:

• N2000

API addresses:

• WMS API: https://kartta.hel.fi/ws/geoserver/avoindata/wms
• WFS API: https://kartta.hel.fi/ws/geoserver/avoindata/wfs

Layers:

WMS:

• Kiinteisto_alue
• Kiinteisto_tunnus

WFS:

• Kiinteisto_alue

Properties: attributes, data types and their key and reliability data in information services:

• id (int). Unique identifier of the feature. Reliable, comprehensively existing information.
• kiinteistotunnus (string). Identifier of the property. Reliable, comprehensively existing information.
• kiinteisto (string). General identifier of the property. Reliable, comprehensively existing information.
• kunta (string). Municipality. Reliable, comprehensively existing information.
• sijaintialue (string). Location area. Reliable, comprehensively existing information.
• ryhma (string). Group. Reliable, comprehensively existing information.
• yksikko (string). Unit. Reliable, comprehensively existing information.
• rekisterointipvm (date). Registration date of the property (yyyy-mm-dd). Reliable, comprehensively existing information.
• luontipvm (date). Feature creation date (yyyy-mm-dd). Reliable, comprehensively existing information.
• muokkauspvm (date). Previous editing date of the feature (yyyy-mm-dd). 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

Source: Helsingin kiinteistöt alueina