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doc/geocoding_functions.md
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# Geocoding Functions
The [geocoder](https://cartodb.com/data/geocoder-api/) functions allow you to match your data with geometries on your map. This geocoding service can be used programatically to geocode datasets via the CartoDB SQL API. It is fed from _Open Data_ and it serves geometries for countries, provinces, states, cities, postal codes, IP addresses and street addresses. CartoDB provides functions for several different categories of geocoding through the Data Services API.
The [geocoder](https://carto.com/data/geocoder-api/) functions allow you to match your data with geometries on your map. This geocoding service can be used programatically to geocode datasets via the Carto SQL API. It is fed from _Open Data_ and it serves geometries for countries, provinces, states, cities, postal codes, IP addresses and street addresses. Carto provides functions for several different categories of geocoding through the Data Services API.
_**This service is subject to quota limitations and extra fees may apply**. View the [Quota Information](http://docs.cartodb.com/cartodb-platform/dataservices-api/quota-information/) section for details and recommendations about to quota consumption._
_**This service is subject to quota limitations and extra fees may apply**. View the [Quota Information](http://docs.carto.com/carto-engine/dataservices-api/quota-information/) section for details and recommendations about to quota consumption._
Here is an example of how to geocode a single country:
```bash
https://{username}.cartodb.com/api/v2/sql?q=SELECT cdb_geocode_admin0_polygon('USA')&api_key={api_key}
https://{username}.carto.com/api/v2/sql?q=SELECT carto_geocode_admin0_polygon('USA')&api_key={api_key}
```
In order to geocode an existent CartoDB dataset, an SQL UPDATE statement must be used to populate the geometry column in the dataset with the results of the Data Services API. For example, if the column where you are storing the country names for each one of our rows is called `country_column`, run the following statement in order to geocode the dataset:
In order to geocode an existent Carto dataset, an SQL UPDATE statement must be used to populate the geometry column in the dataset with the results of the Data Services API. For example, if the column where you are storing the country names for each one of our rows is called `country_column`, run the following statement in order to geocode the dataset:
```bash
https://{username}.cartodb.com/api/v2/sql?q=UPDATE {tablename} SET the_geom = cdb_geocode_admin0_polygon('USA')&api_key={api_key}
https://{username}.carto.com/api/v2/sql?q=UPDATE {tablename} SET the_geom = carto_geocode_admin0_polygon('USA')&api_key={api_key}
```
Notice that you can make use of Postgres or PostGIS functions in your Data Services API requests, as the result is a geometry that can be handled by the system. For example, suppose you need to retrieve the centroid of a specific country, you can wrap the resulting geometry from the geocoder functions inside the PostGIS `ST_Centroid` function:
```bash
https://{username}.cartodb.com/api/v2/sql?q=UPDATE {tablename} SET the_geom = ST_Centroid(cdb_geocode_admin0_polygon('USA'))&api_key={api_key}
https://{username}.carto.com/api/v2/sql?q=UPDATE {tablename} SET the_geom = ST_Centroid(carto_geocode_admin0_polygon('USA'))&api_key={api_key}
```
@@ -29,7 +29,7 @@ The following geocoding functions are available, grouped by categories.
This function geocodes your data into country border geometries. It recognizes the names of the different countries either by different synonyms (such as their English name or their endonym), or by ISO (ISO2 or ISO3) codes.
### cdb_geocode_admin0_polygon(_country_name text_)
### carto_geocode_admin0_polygon(_country_name text_)
Geocodes the text name of a country into a country_name geometry, displayed as polygon data.
@@ -48,20 +48,20 @@ Geometry (polygon, EPSG 4326) or null
##### Update the geometry of a table to geocode it
```bash
UPDATE {tablename} SET the_geom = cdb_geocode_admin0_polygon({country_column})
UPDATE {tablename} SET the_geom = carto_geocode_admin0_polygon({country_column})
```
##### Insert a geocoded row into a table
```bash
INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_admin0_polygon('France')
INSERT INTO {tablename} (the_geom) SELECT carto_geocode_admin0_polygon('France')
```
## Level-1 Administrative Regions Geocoder
This function geocodes your data into polygon geometries for [Level 1](https://en.wikipedia.org/wiki/Table_of_administrative_divisions_by_country), or [NUTS-1](https://en.wikipedia.org/wiki/NUTS_1_statistical_regions_of_England), administrative divisions (or units) of countries. For example, a "state" in the United States, "départements" in France, or an autonomous community in Spain.
### cdb_geocode_admin1_polygon(_admin1_name text_)
### carto_geocode_admin1_polygon(_admin1_name text_)
Geocodes the name of the province/state into a Level-1 administrative region, displayed as a polygon geometry.
@@ -80,17 +80,17 @@ Geometry (polygon, EPSG 4326) or null
##### Update the geometry of a table to geocode it
```bash
UPDATE {tablename} SET the_geom = cdb_geocode_admin1_polygon({province_column})
UPDATE {tablename} SET the_geom = carto_geocode_admin1_polygon({province_column})
```
##### Insert a geocoded row into a table
```bash
INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_admin1_polygon('Alicante')
INSERT INTO {tablename} (the_geom) SELECT carto_geocode_admin1_polygon('Alicante')
```
### cdb_geocode_admin1_polygon(_admin1_name text, country_name text_)
### carto_geocode_admin1_polygon(_admin1_name text, country_name text_)
Geocodes the name of the province/state for a specified country into a Level-1 administrative region, displayed as a polygon geometry.
@@ -110,12 +110,12 @@ Geometry (polygon, EPSG 4326) or null
##### Update the geometry of a table to geocode it
```bash
UPDATE {tablename} SET the_geom = cdb_geocode_admin1_polygon({province_column}, {country_column})
UPDATE {tablename} SET the_geom = carto_geocode_admin1_polygon({province_column}, {country_column})
```
##### Insert a geocoded row into a table
```bash
INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_admin1_polygon('Alicante', 'Spain')
INSERT INTO {tablename} (the_geom) SELECT carto_geocode_admin1_polygon('Alicante', 'Spain')
```
@@ -123,7 +123,7 @@ INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_admin1_polygon('Alicante',
This function geocodes your data into point geometries for names of cities. It is recommended to use geocoding functions that require more defined parameters — this returns more accurate results when several cities have the same name. _If there are duplicate results for a city name, the city name with the highest population will be returned._
### cdb_geocode_namedplace_point(_city_name text_)
### carto_geocode_namedplace_point(_city_name text_)
Geocodes the text name of a city into a named place geometry, displayed as point data.
@@ -144,17 +144,17 @@ Geometry (point, EPSG 4326) or null
##### Update the geometry of a table to geocode it
```bash
UPDATE {tablename} SET the_geom = cdb_geocode_namedplace_point({city_column})
UPDATE {tablename} SET the_geom = carto_geocode_namedplace_point({city_column})
```
##### Insert a geocoded row into a table
```bash
INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_namedplace_point('Barcelona')
INSERT INTO {tablename} (the_geom) SELECT carto_geocode_namedplace_point('Barcelona')
```
### cdb_geocode_namedplace_point(_city_name text, country_name text_)
### carto_geocode_namedplace_point(_city_name text, country_name text_)
Geocodes the text name of a city for a specified country into a named place point geometry.
@@ -174,17 +174,17 @@ Geometry (point, EPSG 4326) or null
##### Update the geometry of a table to geocode it
```bash
UPDATE {tablename} SET the_geom = cdb_geocode_namedplace_point({city_column}, 'Spain')
UPDATE {tablename} SET the_geom = carto_geocode_namedplace_point({city_column}, 'Spain')
```
##### Insert a geocoded row into a table
```bash
INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_namedplace_point('Barcelona', 'Spain')
INSERT INTO {tablename} (the_geom) SELECT carto_geocode_namedplace_point('Barcelona', 'Spain')
```
### cdb_geocode_namedplace_point(_city_name text, admin1_name text, country_name text_)
### carto_geocode_namedplace_point(_city_name text, admin1_name text, country_name text_)
Geocodes your data into a named place point geometry, containing the text name of a city, for a specified province/state and country. This is recommended for the most accurate geocoding of city data.
#### Arguments
@@ -204,22 +204,22 @@ Geometry (point, EPSG 4326) or null
##### Update the geometry of a table to geocode it
```bash
UPDATE {tablename} SET the_geom = cdb_geocode_namedplace_point({city_column}, {province_column}, 'USA')
UPDATE {tablename} SET the_geom = carto_geocode_namedplace_point({city_column}, {province_column}, 'USA')
```
##### Insert a geocoded row into a table
```bash
INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_namedplace_point('New York', 'New York', 'USA')
INSERT INTO {tablename} (the_geom) SELECT carto_geocode_namedplace_point('New York', 'New York', 'USA')
```
## Postal Code Geocoder
This function geocodes your data into point, or polygon, geometries for postal codes. 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](https://www.census.gov/geo/reference/zctas.html) (ZCTA) are used to reference geocodes for USPS postal codes service areas. See the [FAQs](http://docs.cartodb.com/faqs/datasets-and-data/#why-does-cartodb-use-census-bureau-zctas-and-not-usps-zip-codes-for-postal-codes) about datasets and data for details.
**Note:** For the USA, US Census [Zip Code Tabulation Areas](https://www.census.gov/geo/reference/zctas.html) (ZCTA) are used to reference geocodes for USPS postal codes service areas. See the [FAQs](http://docs.carto.com/faqs/datasets-and-data/#why-does-carto-use-census-bureau-zctas-and-not-usps-zip-codes-for-postal-codes) about datasets and data for details.
### cdb_geocode_postalcode_polygon(_postal_code text, country_name text_)
### carto_geocode_postalcode_polygon(_postal_code text, country_name text_)
Goecodes the postal code for a specified country into a **polygon** geometry.
@@ -239,16 +239,16 @@ Geometry (polygon, EPSG 4326) or null
##### Update the geometry of a table to geocode it
```bash
UPDATE {tablename} SET the_geom = cdb_geocode_postalcode_polygon({postal_code_column}, 'USA')
UPDATE {tablename} SET the_geom = carto_geocode_postalcode_polygon({postal_code_column}, 'USA')
```
##### Insert a geocoded row into a table
```bash
INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_postalcode_polygon('11211', 'USA')
INSERT INTO {tablename} (the_geom) SELECT carto_geocode_postalcode_polygon('11211', 'USA')
```
### cdb_geocode_postalcode_point(_code text, country_name text_)
### carto_geocode_postalcode_point(_code text, country_name text_)
Goecodes the postal code for a specified country into a **point** geometry.
@@ -268,13 +268,13 @@ Geometry (point, EPSG 4326) or null
##### Update the geometry of a table to geocode it
```bash
UPDATE {tablename} SET the_geom = cdb_geocode_postalcode_point({postal_code_column}, 'USA')
UPDATE {tablename} SET the_geom = carto_geocode_postalcode_point({postal_code_column}, 'USA')
```
##### Insert a geocoded row into a table
```bash
INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_postalcode_point('11211', 'USA')
INSERT INTO {tablename} (the_geom) SELECT carto_geocode_postalcode_point('11211', 'USA')
```
@@ -282,7 +282,7 @@ INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_postalcode_point('11211',
This function geocodes your data into point geometries for IP addresses. This is useful if you are analyzing location based data, based on a set of user's IP addresses.
### cdb_geocode_ipaddress_point(_ip_address text_)
### carto_geocode_ipaddress_point(_ip_address text_)
Geocodes a postal code from a specified country into an IP address, displayed as a point geometry.
@@ -302,22 +302,22 @@ Geometry (point, EPSG 4326) or null
##### Update the geometry of a table to geocode it
```bash
UPDATE {tablename} SET the_geom = cdb_geocode_ipaddress_point('102.23.34.1')
UPDATE {tablename} SET the_geom = carto_geocode_ipaddress_point('102.23.34.1')
```
##### Insert a geocoded row into a table
```bash
INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_ipaddress_point('102.23.34.1')
INSERT INTO {tablename} (the_geom) SELECT carto_geocode_ipaddress_point('102.23.34.1')
```
## Street-Level Geocoder
This function geocodes your data into a point geometry for a street address. CartoDB uses several different service providers for street-level geocoding, depending on your platform. If you access CartoDB on a Google Cloud Platform, [Google Maps geocoding](https://developers.google.com/maps/documentation/geocoding/intro) is applied. All other platform users are provided with [HERE geocoding services](https://developer.here.com/rest-apis/documentation/geocoder/topics/quick-start.html). Additional service providers will be implemented in the future.
This function geocodes your data into a point geometry for a street address. Carto uses several different service providers for street-level geocoding, depending on your platform. If you access Carto on a Google Cloud Platform, [Google Maps geocoding](https://developers.google.com/maps/documentation/geocoding/intro) is applied. All other platform users are provided with [HERE geocoding services](https://developer.here.com/rest-apis/documentation/geocoder/topics/quick-start.html). Additional service providers will be implemented in the future.
**This service is subject to quota limitations, and extra fees may apply**. View the [Quota information](http://docs.cartodb.com/cartodb-platform/dataservices-api/quota-information/) for details and recommendations about quota consumption.
**This service is subject to quota limitations, and extra fees may apply**. View the [Quota information](http://docs.carto.com/carto-engine/dataservices-api/quota-information/) for details and recommendations about quota consumption.
### cdb_geocode_street_point(_search_text text, [city text], [state text], [country text]_)
### carto_geocode_street_point(_search_text text, [city text], [state text], [country text]_)
Geocodes a complete address into a single street geometry, displayed as point data.
@@ -339,11 +339,11 @@ Geometry (point, EPSG 4326) or null
##### Update the geometry of a table to geocode it
```bash
UPDATE {tablename} SET the_geom = cdb_geocode_street_point({street_name_column})
UPDATE {tablename} SET the_geom = carto_geocode_street_point({street_name_column})
```
##### Insert a geocoded row into a table
```bash
INSERT INTO {tablename} (the_geom) SELECT cdb_geocode_street_point('651 Lombard Street', 'San Francisco', 'California', 'United States')
INSERT INTO {tablename} (the_geom) SELECT carto_geocode_street_point('651 Lombard Street', 'San Francisco', 'California', 'United States')
```