dataservices-api/doc/geocoding_functions.md

Geocoding Functions

The following geocoding functions are available, grouped by categories.

Country geocoder

This function provides a country geocoding service. It recognizes the names of the different countries from different synonyms, such as their English name, their endonym, or their ISO2 or ISO3 codes.

cdb_geocode_admin0_polygon(country_name text)

Arguments

Name	Type	Description
country_name	text	Name of the country

Returns

Geometry (polygon, EPSG 4326) or null

Example

Select

SELECT cdb_geocode_admin0_polygon('France')

Update

UPDATE {tablename} SET the_geom = cdb_geocode_admin0_polygon({country_column})

Level-1 Administrative regions geocoder

The following functions provide a geocoding service for administrative regions of level 1 (or NUTS-1) such as states for the United States, regions in France or autonomous communities in Spain.

cdb_geocode_admin1_polygon(admin1_name text)

Arguments

Name	Type	Description
admin1_name	text	Name of the province/state

Returns

Geometry (polygon, EPSG 4326) or null

Example

Select

SELECT cdb_geocode_admin1_polygon('Alicante')

Update

UPDATE {tablename} SET the_geom = cdb_geocode_admin1_polygon({province_column})

cdb_geocode_admin1_polygon(admin1_name text, country_name text)

Arguments

Name	Type	Description
admin1_name	text	Name of the province/state
country_name	text	Name of the country in which the province/state is located

Returns

Geometry (polygon, EPSG 4326) or null

Example

Select

SELECT cdb_geocode_admin1_polygon('Alicante', 'Spain')

Update

UPDATE {tablename} SET the_geom = cdb_geocode_admin1_polygon({province_column}, {country_column})

City geocoder

The following functions provide a city geocoder service. It is recommended to use the more specific geocoding function -- the one that requires more parameters — in order for the result to be as accurate as possible when several cities share their name.

cdb_geocode_namedplace_point(city_name text)

Arguments

Name	Type	Description
city_name	text	Name of the city

Returns

Geometry (point, EPSG 4326) or null

Example

Select

SELECT cdb_geocode_namedplace_point('Barcelona')

Update

UPDATE {tablename} SET the_geom = cdb_geocode_namedplace_point({city_column})

cdb_geocode_namedplace_point(city_name text, country_name text)

Arguments

Name	Type	Description
city_name	text	Name of the city
country_name	text	Name of the country in which the city is located

Returns

Geometry (point, EPSG 4326) or null

Example

Select

SELECT cdb_geocode_namedplace_point('Barcelona', 'Spain')

Update

UPDATE {tablename} SET the_geom = cdb_geocode_namedplace_point({city_column}, 'Spain')

cdb_geocode_namedplace_point(city_name text, admin1_name text, country_name text)

Arguments

Name	Type	Description
city_name	text	Name of the city
admin1_name	text	Name of the province/state in which the city is located
country_name	text	Name of the country in which the city is located

Returns

Geometry (point, EPSG 4326) or null

Example

Select

SELECT cdb_geocode_namedplace_point('New York', 'New York', 'USA')

Update

UPDATE {tablename} SET the_geom = cdb_geocode_namedplace_point({city_column}, {province_column}, 'USA')

Postal codes geocoder

The following functions provide a postal code geocoding service that can be used to obtain points or polygon results. The postal code polygon geocoder covers the United States, France, Australia and Canada; a request for a different country will return an empty response.

Note: For the USA, US Census Zip Code Tabulation Areas (ZCTA) are used to reference geocodes for USPS postal codes service areas. See the FAQs about datasets and data for details.

cdb_geocode_postalcode_polygon(postal_code text, country_name text)

Arguments

Name	Type	Description
postal_code	text	Postal code
country_name	text	Name of the country in which the postal code is located

Returns

Geometry (polygon, EPSG 4326) or null

Example

Select

SELECT cdb_geocode_postalcode_polygon('11211', 'USA')

Update

UPDATE {tablename} SET the_geom = cdb_geocode_postalcode_polygon({postal_code_column}, 'USA')

cdb_geocode_postalcode_point(code text, country_name text)

Arguments

Name	Type	Description
postal_code	text	Postal code
country_name	text	Name of the country in which the postal code is located

Returns

Geometry (point, EPSG 4326) or null

Example

Select

SELECT cdb_geocode_postalcode_point('11211', 'USA')

Update

UPDATE {tablename} SET the_geom = cdb_geocode_postalcode_point({postal_code_column}, 'USA')

IP addresses geocoder

This function provides an IP address geocoding service, for both IPv4 and IPv6 addresses.

cdb_geocode_ipaddress_point(ip_address text)

Arguments

Name	Type	Description
ip_address	text	Postal code
country_name	text	IPv4 or IPv6 address

Returns

Geometry (point, EPSG 4326) or null

Example

Select

SELECT cdb_geocode_ipaddress_point('102.23.34.1')

Update

UPDATE {tablename} SET the_geom = cdb_geocode_ipaddress_point('102.23.34.1')

Street-level geocoder

This function provides a street-level geocoding service. This service uses the street level geocoder defined for the user.

This service is subject to quota limitations, and extra fees may apply. Please view our terms and conditions and check out the Quota information section for details and recommendations related with quota usage.

cdb_geocode_street_point(search_text text, [city text], [state text], [country text])

Arguments

Name	Type	Description
searchtext	text	searchtext contains free-form text containing address elements. You can specify the searchtext parameter by itself, or you can specify it with other parameters to narrow your search. For example, you can specify the state or country parameters, along with a free-form address in the searchtext field.
city	text	(Optional) Name of the city
state	text	(Optional) Name of the state
country	text	(Optional) Name of the country

Returns

Geometry (point, EPSG 4326) or null

Example

Select

SELECT cdb_geocode_street_point('651 Lombard Street, San Francisco, California, United States')
SELECT cdb_geocode_street_point('651 Lombard Street', 'San Francisco')
SELECT cdb_geocode_street_point('651 Lombard Street', 'San Francisco', 'California')
SELECT cdb_geocode_street_point('651 Lombard Street', 'San Francisco', 'California', 'United States')

Update

UPDATE {tablename} SET the_geom = cdb_geocode_street_point({street_name_column})