# Credit Is Due - [Terms & Conditions](https://opencagedata.com/terms) - [Data Protection / Privacy / GDPR](https://opencagedata.com/gdpr) - [HIPAA](https://opencagedata.com/hipaa) - [Security](https://opencagedata.com/security-policy) - [Credits](https://opencagedata.com/credits) ## OpenCage is built with open source software and open data. ### Background This is a full list of the projects we rely on to build OpenCage. It's our pleasure to support some of these projects financially and by helping maintain the software. Read more about [our efforts to support geo-innovation](https://opencagedata.com/about#geo-innovation). Please take a peak at [the various software projects we've opensourced](https://github.com/opencagedata). ### Datasources #### Nominatim and OpenStreetMap Data [OpenStreetMap](https://www.openstreetmap.org/) and contributors under [ODbL](https://opendatacommons.org/licenses/odbl/). [GPL v2](https://www.gnu.org/licenses/gpl-2.0.html). Please note [the OpenStreetMap Foundation's guidelines around geocoding](https://wiki.osmfoundation.org/wiki/Licence/Community_Guidelines/Geocoding_-_Guideline), specifically the view that geocoding does not trigger the share-alike obligations of the ODbL. We're proud to support OpenStreetMap by being corporate members of the [OpenStreetMap Foundation](https://wiki.osmfoundation.org/wiki/Main_Page), [FOSSGIS e.V.](https://www.fossgis.de) (the official Local Chapter of OSMF for Germany) and the [OpenStreetMap United Kingdom CIC](https://osmuk.org). We're running a [data mirror](https://downloads.opencagedata.com/planet/) of the OpenStreetMap weekly database export. #### DataScienceToolkit Data contributors and licenses are on the [about](https://web.archive.org/web/20200624142939/http://www.datasciencetoolkit.org/about) page. Source code dual licensed under the [MIT](https://opensource.org/licenses/MIT) and [GPL](https://www.gnu.org/licenses/gpl-2.0.html) licenses. #### [Flickr Shapefiles](https://code.flickr.net/2009/05/21/flickr-shapefiles-public-dataset-10/) Data under [CC0 / Public Domain](https://creativecommons.org/publicdomain/zero/1.0/). #### [GeoNames](https://www.geonames.org/) Data under [CC-BY](https://creativecommons.org/licenses/by/4.0/). [Data sources](https://www.geonames.org/data-sources.html) page. #### [Natural Earth Data](https://www.naturalearthdata.com/) Data under [Public Domain](https://www.naturalearthdata.com/about/terms-of-use/). #### [OpenAddresses](https://openaddresses.io) The free and open global address collection. #### [Base Addresses Nationale Ouverte (BANO)](https://www.data.gouv.fr/fr/datasets/base-d-adresses-nationale-ouverte-bano/) Data under [Etalab Open License 2.0](https://www.etalab.gouv.fr/wp-content/uploads/2018/11/open-licence.pdf). #### [Quattroshapes](https://quattroshapes.com/) Data under [CC-BY](https://creativecommons.org/licenses/by/2.0/). [license file](https://github.com/foursquare/quattroshapes/blob/master/LICENSE.md). #### [Twofishes](https://github.com/foursquare/fsqio/tree/master/src/jvm/io/fsq/twofishes) Data under [CC-BY](https://creativecommons.org/licenses/by/2.0/). [Apache 2.0](https://www.apache.org/licenses/LICENSE-2.0.html). #### [what3words](https://www.what3words.com) The what3words Server Software converts searches that are compatible with what3words into geographic coordinates, and converts geographic coordinates into what3words. #### [Postcodes.io](https://postcodes.io) Data under OS OpenData licence. [Data sources](https://postcodes.io/about) page. #### [Yahoo GeoPlanet](https://en.wikipedia.org/wiki/GeoPlanet) Data under [CC-BY](https://creativecommons.org/licenses/by/2.0/). #### [Addok](https://addok.readthedocs.io/en/latest/) Data under ODbL licence. #### [libpostal](https://github.com/openvenues/libpostal) A C library for parsing/normalizing street addresses around the world. #### [G-NAF](https://data.gov.au/dataset/geocoded-national-address-file-g-naf) ©PSMA Australia Limited licensed by the Commonwealth of Australia under the [Open Geo-coded National Address File (G-NAF) End User Licence Agreement](https://data.gov.au/dataset/geocoded-national-address-file-g-naf/resource/09f74802-08b1-4214-a6ea-3591b2753d30). Data under CC BY 4.0, with the additional restriction that the open G-NAF data must not be used for the generation of an address or the compilation of an address for the sending of mail unless the user has verified that each address to be used for the sending of mail is capable of receiving mail by reference to a secondary source of information. #### [Canadian postcodes](https://geocoder.ca/?services=1#postal) Crowdsourced Canadian postal codes dataset #### [UN/LOCODE data](https://en.wikipedia.org/wiki/UN/LOCODE) United Nations Code for Trade and Transport Locations, a public domain dataset that assigns codes to locations used in trade and transport. #### [iana Time Zone Database](https://www.iana.org/time-zones) Data under [Public Domain](https://creativecommons.org/publicdomain/zero/1.0/). #### [India Pincode Directory](https://www.data.gov.in/Godl) All India Pincode Directory which contains all the pincode list across India. Postal Index Number (PIN or PIN Code) is a 6 digit code of Post Office numbering used by India Post. #### Mapzen Terrain Tiles - [Attribution](https://github.com/tilezen/joerd/blob/master/docs/attribution.md) - ArcticDEM terrain data DEM(s) were created from DigitalGlobe, Inc., imagery and funded under National Science Foundation awards 1043681, 1559691, and 1542736; - Australia terrain data © Commonwealth of Australia (Geoscience Australia) 2017; - Austria terrain data © offene Daten Österreichs – Digitales Geländemodell (DGM) Österreich; - Canada terrain data contains information licensed under the Open Government Licence – Canada; - Europe terrain data produced using Copernicus data and information funded by the European Union - EU-DEM layers; - Global ETOPO1 terrain data U.S. National Oceanic and Atmospheric Administration - Mexico terrain data source: INEGI, Continental relief, 2016; - New Zealand terrain data Copyright 2011 Crown copyright (c) Land Information New Zealand and the New Zealand Government (All rights reserved); - Norway terrain data © Kartverket; - United Kingdom terrain data © Environment Agency copyright and/or database right 2015. All rights reserved; - United States 3DEP (formerly NED) and global GMTED2010 and SRTM terrain data courtesy of the U.S. Geological Survey. ### Behind the API What makes OpenCage run? We're glad you asked ... The OpenCage geocoding API is an _aggregating_ API. Every query you shoot at the API generates calls to the various back-end geocoders we have installed. The bulk of the geocoder code is written in Perl, apart from the back-end geocoders which are written in a whole plethora of languages. The API is served by HAProxy and Apache, and the whole lot runs on top of servers running ubuntu, a version of Linux. ### Logos / Icons / Website Resources For preselecting currency and country on our payment pages we use [MaxMind](https://www.maxmind.com) GeoLite2 database, CC BY-SA 4.0 Icons CC BY-4.0 Font Awesome Racket programming logo by Matthew Butterick, LGPL , via Wikimedia Commons. Icons (Convertshape-2) by [Iconsax](https://docs.iconsax.io/license-and-terms/license) [Flaticon](https://www.flaticon.com) Icons, by author: Andrejs Kirma (4867798), ChilliColor (7508926), Eucalyp (4363531, 2166832, 3676408), Freepik (2541979, 1341632, 8465041, 10988190, 7666480, 4645352), Muhammad\_Usman (8942070), Uniconlabs (8439120), juicy\_fish (9482304), photo3idea\_studio (2808516)