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Collaborative project to create a free editable map of the world
In 2004, OpenStreetMap was created by Steve Coast in response to the Ordnance Survey, the United Kingdom's national mapping agency, failing to release its data to the public and under free licences. Initially, maps were created only via GPS traces, but it was quickly populated by importing public domain geographical data such as the U.S. TIGER and tracing permitted aerial photography. OpenStreetMap's adoption was accelerated by Google Maps's introduction of pricing in 2012 and the development of supporting software and applications. The database is hosted by the OpenStreetMap Foundation, a non-profit organisation registered in England and Wales and is funded mostly via donations.
The founder of OpenStreetMap, Steve Coast, in 2009
Steve Coast founded the project in 2004 while at university in Britain, initially focusing on mapping the United Kingdom. In the UK and elsewhere, government-run and tax-funded projects like the Ordnance Survey created massive datasets but declined to freely and widely distribute them. The first contribution was made in the city of London in 2005.
In April 2006, the OpenStreetMap Foundation was established to encourage the growth, development and distribution of free geospatial data and provide geospatial data for anybody to use and share. In December 2006, Yahoo! confirmed that OpenStreetMap could use its aerial photography as a backdrop for map production.
In April 2007, Automotive Navigation Data (AND) donated a complete road data set for the Netherlands and trunk road data for India and China to the project and by July 2007, when the first OpenStreetMap international The State of the Map conference was held, there were 9,000 registered users. Sponsors of the event included Google, Yahoo! and Multimap. In October 2007, OpenStreetMap completed the import of a US CensusTIGER road dataset. In December 2007, Oxford University became the first major organisation to use OpenStreetMap data on their main website.
Ways to import and export data have continued to grow - by 2008, the project developed tools to export OpenStreetMap data to power portable GPS units, replacing their existing proprietary and out-of-date maps. In March, two founders of CloudMade, a commercial company that uses OpenStreetMap data, announced that they had received venture capital funding of EUR2.4million. In November 2010, Bing changed their licence to allow use of their satellite imagery for making maps.
In 2012, the launch of pricing for Google Maps led several prominent websites to switch from their service to OpenStreetMap and other competitors. Chief among these were Foursquare and Craigslist, which adopted OpenStreetMap, and Apple, which ended a contract with Google and launched a self-built mapping platform using TomTom and OpenStreetMap data.
In 2017, DigitalGlobe started providing satellite imagery to aid OpenStreetMap contributions.
In June 2021, OpenStreetMap Foundation announced plans to move from the United Kingdom to a country in the European Union, citing Brexit as the inciting factor. According to the organisation, there are several reasons for the move, including "the failure of the UK and EU to agree on mutual recognition of database rights", the rising difficulties in "banking, finance and using PayPal in the UK" and the loss of .eudomains.
In mid-December 2022, the Linux Foundation announced the launch of a new mapping collaboration, the Overture Maps Foundation. Its stated mission is "powering current and next-generation map products by creating reliable, easy-to-use, and interoperable open map data." Overture founding members were Amazon Web Services (AWS), Meta, Microsoft and TomTom. Overture is to be complementary to OpenStreetMap and Overture encourages members to contribute data directly to OpenStreetMap.
Illustration of OpenStreetMap data primitives (nodes, ways and relations)
Nodes are points with a geographic position, stored as coordinates (pairs of a latitude and a longitude) according to WGS 84. Outside of their usage in ways, they are used to represent map features without a size, such as points of interest or mountain peaks.
Ways are ordered lists of nodes, representing a polyline, or possibly a polygon if they form a closed loop. They are used both for representing linear features such as streets and rivers, and areas, like forests, parks, parking areas and lakes.
Relations are ordered lists of nodes, ways and relations (together called "members"), where each member can optionally have a "role" (a string). Relations are used for representing the relationship of existing nodes and ways. Examples include turn restrictions on roads, routes that span several existing ways (for instance, a long-distance motorway), and areas with holes.
Tags are key-value pairs (both arbitrary strings). They are used to store metadata about the map objects (such as their type, their name and their physical properties). Tags are not freestanding, but are always attached to an object: to a node, a way or a relation. A recommended ontology of map features (the meaning of tags) is maintained on a wiki. New tagging schemes can always be proposed by a popular vote of a written proposal in OpenStreetMap wiki, however, there is no requirement to follow this process. There are over 89 million different kinds of tags in use as of June 2017.
The OpenStreetMap data primitives are stored and processed in different formats.
The main copy of the OpenStreetMap data is stored in OpenStreetMap's main database. The main database is a PostgreSQL database, which has one table for each data primitive, with individual objects stored as rows. All edits happen in this database, and all other formats are created from it.
For data transfer, several database dumps are created, which are available for download. The complete dump is called planet.osm. These dumps exist in two formats, one using XML and one using the Protocol Buffer Binary Format (PBF).
Map data is collected from scratch by volunteers performing systematic ground surveys using tools such as a handheld GPS unit, a notebook, digital camera, or a voice recorder. The data is then entered into the OpenStreetMap database using a number of software tools including JOSM and Merkaator. Mapathon competition events are also held by OpenStreetMap team and by non-profit organisations and local governments to map a particular area.
The availability of aerial photography and other data from commercial and government sources has added important sources of data for manual editing and automated imports. Special processes are in place to handle automated imports and avoid legal and technical problems. OpenStreetMap data has been favourably compared with proprietary datasources, although as of 2009[update] data quality varied across the world.[needs update]
StreetComplete asking user a question. User filled in the answer. After tapping "OK" this answer will be added to an OpenStreetMap database.
Vespucci is the primary full-featured editor for Android; it has been regularly released since 2009.StreetComplete is an Android app launched in 2016, which allows users without any OpenStreetMap knowledge to answer simple questions for existing data in OpenStreetMap, and thus contribute data.Maps.me and OsmAnd, two offline mobile map applications available for Android and iOS, both include limited OpenStreetMap data editors.Go Map!! is an iOS app that lets users create and edit information in OpenStreetMap.Pushpin is another iOS app that lets users add POI on the go.
Ground surveys are performed by a mapper, on foot, bicycle, or in a car, motorcycle, or boat. Map data was typically recorded on a GPS unit. In late 2006 Yahoo! made their aerial imagery available for tracing to OpenStreetMap contributors, which simplified mapping of readily visible and identifiable features. The project still makes use of GPS traces from volunteers which are used to delineate the more difficult to identify and classify features such as footpath, as well as providing ground-truth for aerial imagery alignment.
Once the data has been collected, it is entered into the database by uploading it onto the project's website together with appropriate attribute data. As collecting and uploading data may be separated from editing objects, contribution to the project is possible without using a GPS unit.
Some committed contributors adopt the task of mapping whole towns and cities, or organising mapping parties to gather the support of others to complete a map area. A large number of less active users contribute corrections and small additions to the map.
Out-of-copyright maps can be good sources of information about features that do not change frequently. Copyright periods vary, but in the UK Crown copyright expires after 50 years and hence Ordnance Survey maps until the 1960s can legally be used. A complete set of UK 1 inch/mile maps from the late 1940s and early 1950s has been collected, scanned, and is available online as a resource for contributors.
Field survey in various parts of the Guagua by a group of mappers. They took notes and photos, and recorded GPS tracks. Shown in the photo is the Betis group standing beside one of the Death March trail monuments.
The project has a geographically diverse user-base, due to emphasis of local knowledge and "on-the-ground" situation in the process of data collection. Many early contributors were cyclists who survey with and for bicyclists, charting cycleroutes and navigable trails. Others are GIS professionals who contribute data with an extension for ArcGIS. Contributors are predominately men, with only 3-5% being women.
By August 2008, shortly after the second The State of the Map conference was held, there were over 50,000 registered contributors; by March 2009, there were 100,000 and by the end of 2009 the figure was nearly 200,000. In April 2012, OpenStreetMap cleared 600,000 registered contributors. On 6 January 2013, OpenStreetMap reached one million registered users. Around 30% of users have contributed at least one point to the OpenStreetMap database.
Since 2007, the OpenStreetMap community has held an annual, international conference called State of the Map. There are also various national, regional and continental SotM conferences, such as SotM U.S., SotM Baltics, SotM Asia & SotM Africa.
Some OpenStreetMap data is supplied by companies that choose to freely license either actual street data or satellite imagery sources from which OpenStreetMap contributors can trace roads and features.
Notably, Automotive Navigation Data provided a complete road data set for Netherlands and details of trunk roads in China and India. In December 2006, Yahoo! confirmed that OpenStreetMap was able to make use of their vertical aerial imagery and this photography was available within the editing software as an overlay. Contributors could create their vector based maps as a derived work, released with a free and open licence, until the shutdown of the Yahoo! Maps API on 13 September 2011. In November 2010, Microsoft announced that the OpenStreetMap community could use Bing vertical aerial imagery as a backdrop in its editors. For a period from 2009 to 2011, NearMap Pty Ltd made their high-resolution PhotoMaps (of major Australian cities, plus some rural Australian areas) available for deriving OpenStreetMap data under a CC BY-SA licence.
In June 2018, the Microsoft Bing team announced a major contribution of 125 million U.S. building footprints to the project - four times the number contributed by users and government data imports.
Several open collaborative mapping projects integrate with the OpenStreetMap database or are otherwise affiliated with the OpenStreetMap project:
OpenHistoricalMap is a world historical map based on the OpenStreetMap software platform.
OpenRailwayMap is a detailed online map of the world's railway infrastructure, built on OpenStreetMap data. It has been available since mid-2013 at openrailwaymap.org.
OpenSeaMap is a world nautical chart built as a mashup of OpenStreetMap, crowdsourced water depth tracks, and third-party weather and bathymetric data.
Wheelmap.org is a portal for mapping, browsing, and reviewing wheelchair-accessible places.
OpenStreetMap of Soho, central London, shown in "standard" OpenStreetMap layer
Raw OpenStreetMap data of India loading in QGIS for analysis and mapmaking
OsmAnd is free software for Android and iOS mobile devices that can use offline vector data from OpenStreetMap. It also supports layering OpenStreetMap vector data with prerendered raster map tiles from OpenStreetMap and other sources.
Locus Map is both free software and premium for Android mobile devices that can use offline vector data from OpenStreetMap. It also supports layering OpenStreetMap vector data with prerendered raster map tiles from OpenStreetMap and other sources.
Marble is a KDEvirtual globe application which received support for OpenStreetMap.
Virtlo is a AR based free mobile application for iOS and Android which show's OpenStreetMap data through Augmented Reality.
FoxtrotGPS is a GTK+-based map viewer, that is especially suited to touch input. It is available in the SHR or Debian repositories.
Custom maps can also be generated from OpenStreetMap data through various software including Jawg Maps, Mapnik, Mapbox Studio, Mapzen's Tangrams.
OpenStreetMap maintains lists of online and offline routing engines available, such as the Open Source Routing Machine. OpenStreetMap data is popular with routing researchers, and is also available to open-source projects and companies to build routing applications (or for any other purpose).
OpenStreetMap Philippines GPS map, an end-product of over a thousand crisis mappers that contributed almost 5 million map updates during the 2013 Haiyan humanitarian activation.
The 2010 Haiti earthquake has established a model for non-governmental organisations (NGOs) to collaborate with international organisations. OpenStreetMap and Crisis Commons volunteers using available satellite imagery to map the roads, buildings and refugee camps of Port-au-Prince in just two days, building "the most complete digital map of Haiti's roads".
NGOs, like the Humanitarian OpenStreetMap Team and others, have worked with donors like United States Agency for International Development (USAID) to map other parts of Haiti and parts of many other countries, both to create map data for places that were blank, and to engage and build capacity of local people.
In February 2015, OpenStreetMap added route planning functionality to the map on its official website. The routing uses external services, namely OSRM, GraphHopper and MapQuest.
A variety of popular services incorporate some sort of geolocation or map-based component. Notable services using OpenStreetMap for this include:
Amazon uses OpenStreetMap for navigation and has a team who revises the map based on feedback from drivers.
Apple Inc. unexpectedly created an OpenStreetMap-based map for iPhoto for iOS on 7 March 2012 (2012-03-07), and launched the maps without properly citing the data source - though this was corrected in 1.0.1. OpenStreetMap is one of the many cited sources for Apple's custom maps in iOS 6, though the majority of map data is provided by TomTom. As of February 2021, Apple was the most prolific corporate editor, responsible for 80% of edits to existing roads.
Ballardia (games developer) launched World of the Living Dead: Resurrection in October 2013, which has incorporated OpenStreetMap into its game engine, along with census information, to create a browser-based game mapping over 14,000 square kilometres of greater Los Angeles and survival strategy gameplay. Its previous incarnation had used Google Maps, which had proven incapable of supporting high volumes of players, so during 2013 they shut down the Google Maps version and ported the game to OpenStreetMap.
Craigslist switched to OpenStreetMap in 2012, rendering their own tiles based on the data.
Facebook uses the map directly in its website/mobile app (depending on the zoom level, the area and the device), with a rendering style designed by Stamen Design as of 2021. Facebook has also used AI technology to detect roads absent from OpenStreetMap but visible in aerial imagery ("mapwith.ai" / "Map with AI"), and has developed an OpenStreetMap editing tool ("RapiD") for adding these roads to OpenStreetMap. The "Daylight Map Distribution" is a snapshot of OpenStreetMap data created by Facebook that claims to be clean of vandalism.
Flickr uses OpenStreetMap data for various cities around the world, including Baghdad, Beijing, Kabul, Santiago, Sydney and Tokyo. In 2012, the maps switched to use Nokia data primarily, with OpenStreetMap being used in areas where the commercial provider lacked performance.
Garmin uses OpenStreetMap data for some maps for GPSs units.
Geotab uses OpenStreetMap data in their Vehicle Tracking Software platform, MyGeotab.
Hasbro, the toy company behind the real estate-themed board gameMonopoly, launched Monopoly City Streets, a massively multiplayer online game (MMORPG) which allowed players to "buy" streets all over the world. The game used map tiles from Google Maps and the Google Maps API to display the game board, but the underlying street data was obtained from OpenStreetMap. The online game was a limited time offering, its servers were shut down in the end of January 2010.
Komoot, a route planning service for running, cycling and hiking uses OpenStreetMap data
Mapbox, a provider of custom online maps for websites and applications
MapQuest announced a service based on OpenStreetMap in 2010, which eventually became MapQuest Open.
Mapy.cz is based on OpenStreetMap and extends it by allowing users to upload photos, by making web searches by categories like travel tips, restaurant, accommodation, and by featuring 3D views, areal views, historical photos and haptic mode for blind people. It has apps for both Android and iOS with offline maps.
Moovit uses maps based on OpenStreetMap in their free mobile application for public transit navigation.
Nominatim (from the Latin, 'by name') is a tool to search OpenStreetMap data by name and address (geocoding) and then to generate synthetic addresses of OpenStreetMap points (reverse geocoding).
Wikipedia uses OpenStreetMap data to render custom maps used by the articles. Many languages are included in the WIWOSM project (Wikipedia Where in OpenStreetMap) which aims to show OpenStreetMap objects on a slippy map, directly visible on the article page.
OpenStreetMap data was originally published under the Creative Commons Attribution-ShareAlike licence (CC BY-SA) with the intention of promoting free use and redistribution of the data. In September 2012, the licence was changed to the Open Database Licence (ODbL) published by Open Data Commons (ODC) in order to more specifically define its bearing on data rather than representation.
As part of this relicensing process, some of the map data was removed from the public distribution. This included all data contributed by members that did not agree to the new licensing terms, as well as all subsequent edits to those affected objects. It also included any data contributed based on input data that was not compatible with the new terms. Estimates suggested that over 97% of data would be retained globally, but certain regions would be affected more than others, such as in Australia where 24 to 84% of objects would be retained, depending on the type of object. Ultimately, more than 99% of the data was retained, with Australia and Poland being the countries most severely affected by the change.
All data added to the project needs to have a licence compatible with the Open Database Licence. This can include out-of-copyright information, public domain or other licences. Contributors agree to a set of terms which require compatibility with the current licence. This may involve examining licences for government data to establish whether it is compatible.
Software used in the production and presentation of OpenStreetMap data is available from many different projects and each may have its own licensing. The application-- what users access to edit maps and view changelogs, is powered by Ruby on Rails. The application also uses PostgreSQL for storage of user data and edit metadata. The default map is rendered by Mapnik, stored in PostGIS, and powered by an Apache module called mod_tile. Certain parts of the software, such as the map editor Potlatch2, have been made available as public domain.
^"Import/Guidelines". OpenStreetMap. Archived from the original on 25 March 2015. Retrieved 2015. The import guidelines, along with the Automated Edits code of conduct, should be followed when importing data into the OpenStreetMap database as they embody many lessons learned throughout the history of OpenStreetMap. Imports should be planned and executed with more care and sensitive than other edits, because poor imports can have significant impacts on both existing data and local mapping community.
^Coleman, D. (2013). "Potential Contributions and Challenges of VGI for Conventional Topographic Base-Mapping Programs". In Sui, D.; Elwood, S; Goodchild, M. (eds.). Crowdsourcing Geographic Knowledge: Volunteered Geographic Information (VGI) in Theory and Practice. New York, London: Springer Science+Business Media Dordrecht. pp. 245-264. doi:10.1007/978-94-007-4587-2. ISBN978-94-007-4586-5.