Topics:

Address lookup

Address lookup, otherwise known as reverse geocoding, is used for finding places/addresses for given coordinates. The features property of the results returned is where you will find the list of results that matched the best with your input parameters.

Endpoint

http://api.digitransit.fi/geocoding/v1/reverse

Supported URL parameters

Parameter Type Description
point.lat floating point number Latitude value
point.lon floating point number Longitude value
boundary.circle.radius floating point number Searches only within the given radius from the location
lang string Returns results in the preferred language if such a language-bound name version is available (value can be fi, sv or en)
size integer Limits the number of results returned
layers comma-delimited string array Filters results by layer (see list of possible values here, commonly used values are address, venue and street)
sources comma-delimited string array Filters results by source (value can be oa (OpenAddresses), osm (OpenStreetMap) or nlsfi (National Land Survey))

Note: parameter boundary.country is not used by Digitransit, as only data from Finland is available.

Response fields

Name Type Description
id string
gid string Global id that consists of a layer (such as address or country), an identifier for the original data source (such as openstreetmap or openaddresses), and an id for the individual record corresponding to the original source identifier, where possible.
layer string Place type (e.g. address), see list of possible values here
source string Data source, for example openstreetmap, openaddresses or nlsfi
source_id string
name string A short description of the location, for example a business name, a locality name, or part of an address, depending on what is being searched for and what is returned.
postalcode number
postalcode_gid string
confidence number An estimation (as a percentage) of how accurately this result matches the query
distance number A distance from the query point (in kilometers)
accuracy string
country string Places that issue passports, nations, nation-states
country_gid string
country_a string ISO 3166-1 alpha-3 country code, for example FIN
region string For example Uusimaa
region_gid string
localadmin string Local administrative boundaries, for example Helsinki
localadmin_gid string
locality string Towns, hamlets, cities, for example Helsinki
locality_gid string
neighbourhood string Social communities, neighbourhoods, for example Itä-Pasila
neighbourhood_gid string
label string A human-friendly representation of the place with the most complete details, that is ready to be displayed to an end user, for example East-West Pub, Itä-Pasila, Helsinki
bbox string If present, it describes the geographic extent of the feature, such as the screen size necessary to show all of California without needing to send the precise polygon geometry.

Request examples

Request to get only one result for the given coordinates

http://api.digitransit.fi/geocoding/v1/reverse?point.lat=60.199284&point.lon=24.940540&size=1

Note: Using parameter size=1 limits the number of results returned to one.

Request to get results for the given coordinates

https://api.digitransit.fi/geocoding/v1/reverse?point.lat=60.170278&point.lon=24.9369448

Note: This will return 10 places by default as the default value of the size parameter is 10 (the maximum value is 40). Specifying a value greater than 40 will override to 40 and return a warning in the response metadata.

Request to get venue results for the same given coordinates

https://api.digitransit.fi/geocoding/v1/reverse?point.lat=60.170278&point.lon=24.9369448&layers=venue

Note: Using parameter layers=venue returns results for points of interest, businesses, things with walls.

Request to get places with a street address for the same given coordinates

https://api.digitransit.fi/geocoding/v1/reverse?point.lat=60.170278&point.lon=24.9369448&layers=address

Note: Using parameter layers=address returns results for places with a street address.

Request to get results for the given coordinates using language preference

http://api.digitransit.fi/geocoding/v1/reverse?point.lat=60.195&point.lon=24.93&lang=sv

Note: Using parameter lang=sv returns results in Swedish if such a language-bound name version is available.

Part of the provided geocoding data does not include Swedish names, and part of the data does not specify the language at all. A swedish-speaking person may add a new address entry 'Fabriksgatan xx, Helsingfors' to OpenStreetMap without specifying the language. Address lookup always searches across all documents and returns found items in the preferred language if such a language-bound name version is available, otherwise using the default name, which in reality can represent any language. Most default names are of course in Finnish.

Test the API

Address lookup

Press run to display a map with a marker.
Click the marker to see the address in its location.