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navigation</a> <a class="mw-jump-link" href="#searchInput">Jump to search</a> <div id="mw-content-text" class="mw-body-content mw-content-ltr" lang="en" dir="ltr"><div class="mw-parser-output"><div class="languages noprint navigation-not-searchable" style="clear:both;font-size:95%;line-height:normal;margin:2px 0;border:1px solid #AAA" dir="ltr"> <div style="background:#EEE;padding:1px"> <div class="hlist" style="float:right;margin-left:.25em;font-weight:normal;font-size:x-small"> <ul><li><bdi class="noprint plainlinks purgelink"><a rel="nofollow" class="external text" href="//wiki.openstreetmap.org/w/index.php?title=Develop&action=purge"><span title="Purge this page"><span style="margin:0 2px"><img alt="" src="https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Octicons-sync.svg/10px-Octicons-sync.svg.png" decoding="async" width="10" height="13" srcset="https://upload.wikimedia.org/wikipedia/commons/thumb/1/1a/Octicons-sync.svg/15px-Octicons-sync.svg.png 1.5x, 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href="/w/index.php?title=Cnr:Develop&action=edit&redlink=1" class="new" title="Cnr:Develop (page does not exist)"> Crnogorski </a></span></li> <li><span dir="auto" lang="cs"><a href="/w/index.php?title=Cs:Develop&action=edit&redlink=1" class="new" title="Cs:Develop (page does not exist)"> čeština </a></span></li> <li><span dir="auto" lang="da"><a href="/w/index.php?title=Da:Develop&action=edit&redlink=1" class="new" title="Da:Develop (page does not exist)"> dansk </a></span></li> <li><span dir="auto" lang="de"><a href="/wiki/DE:Develop" title="DE:Develop"> Deutsch </a></span></li> <li><span dir="auto" lang="et"><a href="/w/index.php?title=Et:Develop&action=edit&redlink=1" class="new" title="Et:Develop (page does not exist)"> eesti </a></span></li> <li><span dir="auto" lang="en"><a class="mw-selflink selflink"> English </a></span></li> <li><span dir="auto" lang="es"><a href="/wiki/ES:Develop" class="mw-redirect" title="ES:Develop"> español </a></span></li> <li><span dir="auto" lang="eo"><a href="/w/index.php?title=Eo:Develop&action=edit&redlink=1" class="new" title="Eo:Develop (page does not exist)"> Esperanto </a></span></li> <li><span dir="auto" lang="eu"><a href="/w/index.php?title=Eu:Develop&action=edit&redlink=1" class="new" title="Eu:Develop (page does not exist)"> euskara </a></span></li> <li><span dir="auto" lang="fr"><a href="/wiki/FR:Develop" class="mw-redirect" title="FR:Develop"> français </a></span></li> <li><span dir="auto" lang="fy"><a href="/wiki/Fy:Develop" title="Fy:Develop"> Frysk </a></span></li> <li><span dir="auto" lang="gd"><a href="/w/index.php?title=Gd:Develop&action=edit&redlink=1" class="new" title="Gd:Develop (page does not exist)"> Gàidhlig </a></span></li> <li><span dir="auto" lang="gl"><a href="/wiki/Gl:Develop" class="mw-redirect" title="Gl:Develop"> galego </a></span></li> <li><span dir="auto" lang="hr"><a href="/w/index.php?title=Hr:Develop&action=edit&redlink=1" class="new" title="Hr:Develop (page does not exist)"> hrvatski </a></span></li> <li><span dir="auto" lang="io"><a href="/w/index.php?title=Io:Develop&action=edit&redlink=1" class="new" title="Io:Develop (page does not exist)"> Ido </a></span></li> <li><span dir="auto" lang="ia"><a href="/w/index.php?title=Ia:Develop&action=edit&redlink=1" class="new" title="Ia:Develop (page does not exist)"> interlingua </a></span></li> <li><span dir="auto" lang="is"><a href="/w/index.php?title=Is:Develop&action=edit&redlink=1" class="new" title="Is:Develop (page does not exist)"> íslenska </a></span></li> <li><span dir="auto" lang="it"><a href="/wiki/IT:Develop" class="mw-redirect" title="IT:Develop"> italiano </a></span></li> <li><span dir="auto" lang="ht"><a href="/w/index.php?title=Ht:Develop&action=edit&redlink=1" class="new" title="Ht:Develop (page does not exist)"> Kreyòl ayisyen </a></span></li> <li><span dir="auto" lang="gcf"><a href="/w/index.php?title=Gcf:Develop&action=edit&redlink=1" class="new" title="Gcf:Develop (page does not exist)"> kréyòl gwadloupéyen </a></span></li> <li><span dir="auto" lang="ku"><a href="/w/index.php?title=Ku:Develop&action=edit&redlink=1" class="new" title="Ku:Develop (page does not exist)"> kurdî </a></span></li> <li><span dir="auto" lang="lv"><a href="/w/index.php?title=Lv:Develop&action=edit&redlink=1" class="new" title="Lv:Develop (page does not exist)"> latviešu </a></span></li> <li><span dir="auto" lang="lb"><a href="/w/index.php?title=Lb:Develop&action=edit&redlink=1" class="new" title="Lb:Develop (page does not exist)"> Lëtzebuergesch </a></span></li> <li><span dir="auto" lang="lt"><a href="/w/index.php?title=Lt:Develop&action=edit&redlink=1" class="new" title="Lt:Develop (page does not exist)"> lietuvių </a></span></li> <li><span dir="auto" lang="hu"><a href="/wiki/Hu:Develop" title="Hu:Develop"> magyar </a></span></li> <li><span dir="auto" lang="nl"><a href="/wiki/NL:Develop" title="NL:Develop"> Nederlands </a></span></li> <li><span dir="auto" lang="no"><a href="/w/index.php?title=No:Develop&action=edit&redlink=1" class="new" title="No:Develop (page does not exist)"> norsk </a></span></li> <li><span dir="auto" lang="nn"><a href="/w/index.php?title=Nn:Develop&action=edit&redlink=1" class="new" title="Nn:Develop (page does not exist)"> norsk nynorsk </a></span></li> <li><span dir="auto" lang="oc"><a href="/w/index.php?title=Oc:Develop&action=edit&redlink=1" class="new" title="Oc:Develop (page does not exist)"> occitan </a></span></li> <li><span dir="auto" lang="pl"><a href="/wiki/Pl:Develop" title="Pl:Develop"> polski </a></span></li> <li><span dir="auto" lang="pt"><a href="/wiki/Pt:Develop" title="Pt:Develop"> português </a></span></li> <li><span dir="auto" lang="ro"><a href="/w/index.php?title=Ro:Develop&action=edit&redlink=1" class="new" title="Ro:Develop (page does not exist)"> română </a></span></li> <li><span dir="auto" lang="sc"><a href="/w/index.php?title=Sc:Develop&action=edit&redlink=1" class="new" title="Sc:Develop (page does not exist)"> sardu </a></span></li> <li><span dir="auto" lang="sq"><a href="/w/index.php?title=Sq:Develop&action=edit&redlink=1" class="new" title="Sq:Develop (page does not exist)"> shqip </a></span></li> <li><span dir="auto" lang="sk"><a href="/w/index.php?title=Sk:Develop&action=edit&redlink=1" class="new" title="Sk:Develop (page does not exist)"> slovenčina </a></span></li> <li><span dir="auto" lang="sl"><a href="/w/index.php?title=Sl:Develop&action=edit&redlink=1" class="new" title="Sl:Develop (page does not exist)"> slovenščina </a></span></li> <li><span dir="auto" lang="sr-latn"><a href="/w/index.php?title=Sr-latn:Develop&action=edit&redlink=1" class="new" title="Sr-latn:Develop (page does not exist)"> srpski (latinica) </a></span></li> <li><span dir="auto" lang="fi"><a href="/w/index.php?title=Fi:Develop&action=edit&redlink=1" class="new" title="Fi:Develop (page does not exist)"> suomi </a></span></li> <li><span dir="auto" lang="sv"><a href="/w/index.php?title=Sv:Develop&action=edit&redlink=1" class="new" title="Sv:Develop (page does not exist)"> svenska </a></span></li> <li><span dir="auto" lang="tl"><a href="/w/index.php?title=Tl:Develop&action=edit&redlink=1" class="new" title="Tl:Develop (page does not exist)"> Tagalog </a></span></li> <li><span dir="auto" lang="vi"><a href="/w/index.php?title=Vi:Develop&action=edit&redlink=1" class="new" title="Vi:Develop (page does not exist)"> Tiếng Việt </a></span></li> <li><span dir="auto" lang="tr"><a href="/w/index.php?title=Tr:Develop&action=edit&redlink=1" class="new" title="Tr:Develop (page does not exist)"> Türkçe </a></span></li> <li><span dir="auto" lang="diq"><a href="/w/index.php?title=Diq:Develop&action=edit&redlink=1" class="new" title="Diq:Develop (page does not exist)"> Zazaki </a></span></li> <li><span dir="auto" lang="el"><a href="/w/index.php?title=El:Develop&action=edit&redlink=1" class="new" title="El:Develop (page does not exist)"> Ελληνικά </a></span></li> <li><span dir="auto" lang="be"><a href="/w/index.php?title=Be:Develop&action=edit&redlink=1" class="new" title="Be:Develop (page does not exist)"> беларуская </a></span></li> <li><span dir="auto" lang="bg"><a href="/wiki/Bg:Develop" title="Bg:Develop"> български </a></span></li> <li><span dir="auto" lang="mk"><a href="/w/index.php?title=Mk:Develop&action=edit&redlink=1" class="new" title="Mk:Develop (page does not exist)"> македонски </a></span></li> <li><span dir="auto" lang="mn"><a href="/w/index.php?title=Mn:Develop&action=edit&redlink=1" class="new" title="Mn:Develop (page does not exist)"> монгол </a></span></li> <li><span dir="auto" lang="ru"><a href="/wiki/RU:Develop" title="RU:Develop"> русский </a></span></li> <li><span dir="auto" lang="sr"><a href="/w/index.php?title=Sr:Develop&action=edit&redlink=1" class="new" title="Sr:Develop (page does not exist)"> српски / srpski </a></span></li> <li><span dir="auto" lang="uk"><a href="/wiki/Uk:Develop" title="Uk:Develop"> українська </a></span></li> <li><span dir="auto" lang="hy"><a href="/w/index.php?title=Hy:Develop&action=edit&redlink=1" class="new" title="Hy:Develop (page does not exist)"> հայերեն </a></span></li> <li><span dir="auto" lang="he"><a href="/wiki/He:Develop" title="He:Develop"> עברית </a></span></li> <li><span dir="auto" lang="ar"><a href="/wiki/Ar:Develop" class="mw-redirect" title="Ar:Develop"> العربية </a></span></li> <li><span dir="auto" lang="skr"><a href="/w/index.php?title=Skr:Develop&action=edit&redlink=1" class="new" title="Skr:Develop (page does not exist)"> سرائیکی </a></span></li> <li><span dir="auto" lang="fa"><a href="/wiki/Fa:Develop" title="Fa:Develop"> فارسی </a></span></li> <li><span dir="auto" lang="pnb"><a href="/w/index.php?title=Pnb:Develop&action=edit&redlink=1" class="new" title="Pnb:Develop (page does not exist)"> پنجابی </a></span></li> <li><span dir="auto" lang="ps"><a href="/w/index.php?title=Ps:Develop&action=edit&redlink=1" class="new" title="Ps:Develop (page does not exist)"> پښتو </a></span></li> <li><span dir="auto" lang="ne"><a href="/w/index.php?title=Ne:Develop&action=edit&redlink=1" class="new" title="Ne:Develop (page does not exist)"> नेपाली </a></span></li> <li><span dir="auto" lang="mr"><a href="/w/index.php?title=Mr:Develop&action=edit&redlink=1" class="new" title="Mr:Develop (page does not exist)"> मराठी </a></span></li> <li><span dir="auto" lang="hi"><a href="/w/index.php?title=Hi:Develop&action=edit&redlink=1" class="new" title="Hi:Develop (page does not exist)"> हिन्दी </a></span></li> <li><span dir="auto" lang="bn"><a href="/w/index.php?title=Bn:Develop&action=edit&redlink=1" class="new" title="Bn:Develop (page does not exist)"> বাংলা </a></span></li> <li><span dir="auto" lang="pa"><a href="/w/index.php?title=Pa:Develop&action=edit&redlink=1" class="new" title="Pa:Develop (page does not exist)"> ਪੰਜਾਬੀ </a></span></li> <li><span dir="auto" lang="ta"><a href="/w/index.php?title=Ta:Develop&action=edit&redlink=1" class="new" title="Ta:Develop (page does not exist)"> தமிழ் </a></span></li> <li><span dir="auto" lang="ml"><a href="/w/index.php?title=Ml:Develop&action=edit&redlink=1" class="new" title="Ml:Develop (page does not exist)"> മലയാളം </a></span></li> <li><span dir="auto" lang="si"><a href="/w/index.php?title=Si:Develop&action=edit&redlink=1" class="new" title="Si:Develop (page does not exist)"> සිංහල </a></span></li> <li><span dir="auto" lang="th"><a href="/w/index.php?title=Th:Develop&action=edit&redlink=1" class="new" title="Th:Develop (page does not exist)"> ไทย </a></span></li> <li><span dir="auto" lang="my"><a href="/w/index.php?title=My:Develop&action=edit&redlink=1" class="new" title="My:Develop (page does not exist)"> မြန်မာဘာသာ </a></span></li> <li><span dir="auto" lang="ko"><a href="/wiki/Ko:Develop" title="Ko:Develop"> 한국어 </a></span></li> <li><span dir="auto" lang="ka"><a href="/w/index.php?title=Ka:Develop&action=edit&redlink=1" class="new" title="Ka:Develop (page does not exist)"> ქართული </a></span></li> <li><span dir="auto" lang="tzm"><a href="/w/index.php?title=Tzm:Develop&action=edit&redlink=1" class="new" title="Tzm:Develop (page does not exist)"> ⵜⴰⵎⴰⵣⵉⵖⵜ </a></span></li> <li><span dir="auto" lang="zh-hans"><a href="/wiki/Zh-hans:Develop" title="Zh-hans:Develop"> 中文（简体） </a></span></li> <li><span dir="auto" lang="zh-hant"><a href="/wiki/Zh-hant:Develop" title="Zh-hant:Develop"> 中文（繁體） </a></span></li> <li><span dir="auto" lang="ja"><a href="/wiki/JA:Develop" class="mw-redirect" title="JA:Develop"> 日本語 </a></span></li> <li><span dir="auto" lang="yue"><a href="/w/index.php?title=Yue:Develop&action=edit&redlink=1" class="new" title="Yue:Develop (page does not exist)"> 粵語 </a></span></li></div> </div> <div class="nomobile" style="background:#EEE;padding:1px"> <div id="ExpandLanguages" class="hlist" style="font-weight:bold;max-height:10000000px;text-align:center"> <ul><li><a href="#top">Other languages...</a></li></ul> </div> </div> </div> <div style="font-size:120%;font-family:Georgia,serif"> <p><i>OpenStreetMap isn't just open data - it's also open source, and you can help!</i> </p> </div> <p>There are two major ways you can get involved in OpenStreetMap: </p> <ul><li>By <a class="mw-selflink selflink">developing the OpenStreetMap Platform itself</a>. This includes the OpenStreetMap.org website and related components and services.</li> <li>By <a href="/wiki/Using_OpenStreetMap#Software_development" title="Using OpenStreetMap">Using OpenStreetMap</a>. You can "use" OpenStreetMap data and services together with software and services from our community to build anything you want.</li></ul> <div id="toc" class="toc" role="navigation" aria-labelledby="mw-toc-heading"><input type="checkbox" role="button" id="toctogglecheckbox" class="toctogglecheckbox" style="display:none" /><div class="toctitle" lang="en" dir="ltr"><h2 id="mw-toc-heading">Contents</h2><span class="toctogglespan"><label class="toctogglelabel" for="toctogglecheckbox"></label></span></div> <ul> <li class="toclevel-1 tocsection-1"><a href="#Get_in_touch"><span class="tocnumber">1</span> <span class="toctext">Get in touch</span></a></li> <li class="toclevel-1 tocsection-2"><a href="#How_the_pieces_fit_together"><span class="tocnumber">2</span> <span class="toctext">How the pieces fit together</span></a></li> <li class="toclevel-1 tocsection-3"><a href="#Background"><span class="tocnumber">3</span> <span class="toctext">Background</span></a></li> <li class="toclevel-1 tocsection-4"><a href="#How_to_get_involved"><span class="tocnumber">4</span> <span class="toctext">How to get involved</span></a></li> <li class="toclevel-1 tocsection-5"><a href="#Main_projects"><span class="tocnumber">5</span> <span class="toctext">Main projects</span></a> <ul> <li class="toclevel-2 tocsection-6"><a href="#The_OSM_website_Rails_Port_(Ruby)"><span class="tocnumber">5.1</span> <span class="toctext">The OSM website Rails Port (Ruby)</span></a></li> <li class="toclevel-2 tocsection-7"><a href="#Search,_geocoding_Nominatim"><span class="tocnumber">5.2</span> <span class="toctext">Search, geocoding Nominatim</span></a></li> <li class="toclevel-2 tocsection-8"><a href="#Desktop_map_data_editor_JOSM_(Java)"><span class="tocnumber">5.3</span> <span class="toctext">Desktop map data editor JOSM (Java)</span></a></li> <li class="toclevel-2 tocsection-9"><a href="#Online_map_data_editor_iD_(Javascript)"><span class="tocnumber">5.4</span> <span class="toctext">Online map data editor iD (Javascript)</span></a></li> <li class="toclevel-2 tocsection-10"><a href="#Default_style_at_OSM.org"><span class="tocnumber">5.5</span> <span class="toctext">Default style at OSM.org</span></a></li> <li class="toclevel-2 tocsection-11"><a href="#Desktop_map_data_editor_Potlatch_3_(ActionScript)"><span class="tocnumber">5.6</span> <span class="toctext">Desktop map data editor Potlatch 3 (ActionScript)</span></a></li> <li class="toclevel-2 tocsection-12"><a href="#OSM_data_processing_Swiss_Army_knife_Osmium_(C++)"><span class="tocnumber">5.7</span> <span class="toctext">OSM data processing Swiss Army knife Osmium (C++)</span></a></li> <li class="toclevel-2 tocsection-13"><a href="#OSM_data_processing_swiss_army_knife_Osmosis_(Java)"><span class="tocnumber">5.8</span> <span class="toctext">OSM data processing swiss army knife Osmosis (Java)</span></a></li> <li class="toclevel-2 tocsection-14"><a href="#OSM_data_importer_for_rendering_or_geocoding_osm2pgsql_(C++)"><span class="tocnumber">5.9</span> <span class="toctext">OSM data importer for rendering or geocoding osm2pgsql (C++)</span></a></li> <li class="toclevel-2 tocsection-15"><a href="#OSM_data_importer_for_analytics_openstreetmap_h3_(Java)"><span class="tocnumber">5.10</span> <span class="toctext">OSM data importer for analytics openstreetmap_h3 (Java)</span></a></li> <li class="toclevel-2 tocsection-16"><a href="#OSM_database_toolkit_GeoDesk_(Java,_Python_and_C++)"><span class="tocnumber">5.11</span> <span class="toctext">OSM database toolkit GeoDesk (Java, Python and C++)</span></a></li> <li class="toclevel-2 tocsection-17"><a href="#Slippy_map_library_Leaflet_(JavaScript)"><span class="tocnumber">5.12</span> <span class="toctext">Slippy map library Leaflet (JavaScript)</span></a></li> <li class="toclevel-2 tocsection-18"><a href="#Map_rendering_with_Mapnik_(C++)"><span class="tocnumber">5.13</span> <span class="toctext">Map rendering with Mapnik (C++)</span></a></li> <li class="toclevel-2 tocsection-19"><a href="#Tile_rendering_system_with_Tirex_(C++_and_Perl)"><span class="tocnumber">5.14</span> <span class="toctext">Tile rendering system with Tirex (C++ and Perl)</span></a></li> <li class="toclevel-2 tocsection-20"><a href="#And_other..."><span class="tocnumber">5.15</span> <span class="toctext">And other...</span></a></li> </ul> </li> <li class="toclevel-1 tocsection-21"><a href="#Related_topics"><span class="tocnumber">6</span> <span class="toctext">Related topics</span></a></li> <li class="toclevel-1 tocsection-22"><a href="#See_also"><span class="tocnumber">7</span> <span class="toctext">See also</span></a></li> <li class="toclevel-1 tocsection-23"><a href="#External_links"><span class="tocnumber">8</span> <span class="toctext">External links</span></a></li> </ul> </div> <h2><span class="mw-headline" id="Get_in_touch">Get in touch</span></h2> <p>If you have questions, ideas or just want to meet fellow developers, you can contact the OpenStreetMap development community by using channels listed below. </p> <ul><li><a href="/wiki/IRC" title="IRC">IRC</a> <ul><li>#osm-dev channel on the OFTC network</li></ul></li> <li><a href="/wiki/Mailing_Lists" class="mw-redirect" title="Mailing Lists">Mailing Lists</a> <ul><li><a class="external text" href="https://lists.openstreetmap.org/listinfo/dev">General mailing list for developers</a></li> <li><a class="external text" href="https://lists.openstreetmap.org/listinfo/rails-dev">OpenStreetMap.org website development</a></li></ul></li> <li>Other <a href="/wiki/Contact_channels" title="Contact channels">contact channels</a> including <a class="external text" href="https://community.openstreetmap.org/">official forums</a></li></ul> <h2><span class="mw-headline" id="How_the_pieces_fit_together">How the pieces fit together</span></h2> <p>The code that runs openstreetmap.org is composed of independent components that work together to provide an <a href="/wiki/API" title="API">API</a>, <a href="/wiki/Slippy_Map" class="mw-redirect" title="Slippy Map">Slippy Map</a>, and other bits of functionality. </p><p>The <a href="/wiki/Rails_port" class="mw-redirect" title="Rails port">Rails port</a> is the Ruby on Rails application that powers openstreetmap.org; it's where OSM's pages and basic <a href="/wiki/API" title="API">API</a> originate. OpenStreetMap's data, "the planet", are stored in <a href="/wiki/PostgreSQL" title="PostgreSQL">PostgreSQL</a> with <a href="/wiki/PostGIS" title="PostGIS">PostGIS</a>, and rendered into pretty map tiles with <a href="/wiki/Mapnik" title="Mapnik">Mapnik</a>. The <a href="/wiki/Slippy_Map" class="mw-redirect" title="Slippy Map">Slippy Map</a> interface for those tiles — what lets you pan and zoom the map — is powered by <a href="/wiki/Leaflet" title="Leaflet">Leaflet</a>. </p><p>Internally, <a href="/wiki/Osm2pgsql" title="Osm2pgsql">osm2pgsql</a>, and <a href="/wiki/Osmosis" title="Osmosis">osmosis</a> or <a href="/wiki/Osmium" title="Osmium">osmium</a> are essential infrastructure for converting <a href="/wiki/OSM_XML" title="OSM XML">OSM XML</a> to <a href="/wiki/PostGIS" title="PostGIS">PostGIS</a>. They work with <a href="/wiki/Planet.osm" title="Planet.osm">Planet.osm</a> and other extracts, which let other sites use and distribute OSM data. </p><p>Users can add and modify OpenStreetMap data thanks to open-source <a href="/wiki/Editor" class="mw-redirect" title="Editor">editors</a> like <a href="/wiki/ID" title="ID">iD</a>, <a href="/wiki/JOSM" title="JOSM">JOSM</a>, <a href="/wiki/Vespucci" title="Vespucci">Vespucci</a>, <a href="/wiki/Go_Map!!" title="Go Map!!">Go Map!!</a>, <a href="/wiki/StreetComplete" title="StreetComplete">StreetComplete</a> and <a href="/wiki/Editors" title="Editors">others</a>. </p><p>There are many independent projects - for example iD editor is a <a rel="nofollow" class="external text" href="https://github.com/openstreetmap/iD">separate project</a>, its <a rel="nofollow" class="external text" href="https://github.com/openstreetmap/id-tagging-schema">tagging schema</a> is a separate repository. And iD tagging schema is used also for example by <a rel="nofollow" class="external text" href="https://github.com/streetcomplete/StreetComplete/blob/master/CONTRIBUTING.md#dependencies">StreetComplete</a> (via <a rel="nofollow" class="external text" href="https://github.com/westnordost/osmfeatures">osmfeatures</a> which is a dedicated project to make easier to use this data) and <a rel="nofollow" class="external text" href="https://github.com/bryceco/GoMap#external-assets">Go Map!!</a>. </p><p>Note that different projects may be run by different people. For example <a href="/wiki/MapComplete" title="MapComplete">MapComplete</a>, <a href="/wiki/RapiD" class="mw-redirect" title="RapiD">RapiD</a> and <a href="/wiki/Osm2pgsql" title="Osm2pgsql">osm2pgsql</a> is maintained by different teams, with own plans, development style and resources. Though some contributors may overlap. </p> <h2><span class="mw-headline" id="Background">Background</span></h2> <p>There's plenty to know about OpenStreetMap's style of storing & modifying geodata that will help you get how things work. Review the <a href="/wiki/XML_schema" class="mw-redirect" title="XML schema">XML schema</a>, <a href="/wiki/Data_Primitives" class="mw-redirect" title="Data Primitives">Data Primitives</a>, and <a href="/wiki/Downloading_data" title="Downloading data">Downloading data</a> if you want to work on data-related tasks. </p><p>Also, OpenStreetMap runs on a relatively small server deployment for its size - see our notes on <a href="/wiki/Server_Hardware" class="mw-redirect" title="Server Hardware">server hardware</a> for details. There are also <a href="/wiki/API_v0.6" title="API v0.6">API v0.6</a> mirrors and <a rel="nofollow" class="external text" href="https://apis.dev.openstreetmap.org">Dev and Test APIs</a> which help with testing code that interacts with the OSM API. </p> <h2><span class="mw-headline" id="How_to_get_involved">How to get involved</span></h2> <p>Many of OpenStreetMap's projects use Git (<a rel="nofollow" class="external free" href="https://github.com/openstreetmap/">https://github.com/openstreetmap/</a> and <a rel="nofollow" class="external free" href="https://github.com/osmlab">https://github.com/osmlab</a> host some core projects), and so you can simply <a rel="nofollow" class="external text" href="https://help.github.com/articles/fork-a-repo">fork a repository and contribute changes</a>. </p><p>For larger changes, you may want to <a href="/wiki/Using_the_dev_server" title="Using the dev server">get an account on a development server</a> to do serious testing. </p> <h2><span class="mw-headline" id="Main_projects">Main projects</span></h2> <h3><span id="The_OSM_website_Rails_Port_.28Ruby.29"></span><span class="mw-headline" id="The_OSM_website_Rails_Port_(Ruby)">The OSM website <a href="/wiki/Rails_Port" class="mw-redirect" title="Rails Port">Rails Port</a> (Ruby)</span></h3> <p>Powers <a class="external free" href="https://www.openstreetmap.org/">https://www.openstreetmap.org/</a> website and <a href="/wiki/Editing_API" class="mw-redirect" title="Editing API">editing API</a>. The <a href="/wiki/Rails_port" class="mw-redirect" title="Rails port">Rails port</a> page has plenty of useful information for getting started. <b>Design</b> help is needed here: read <a href="/wiki/Rails_port/UI" class="mw-redirect" title="Rails port/UI">Rails_port/UI</a> for a quickstart guide for designers. New users can also <a rel="nofollow" class="external text" href="https://github.com/openstreetmap/openstreetmap-website/pulls">review pull requests</a> as practice for getting the Rails Port set up. You can also help by <a rel="nofollow" class="external text" href="http://translatewiki.net/w/i.php?title=Special:Translate&group=out-osm-site">contributing translations</a>. </p> <ul><li><a rel="nofollow" class="external text" href="https://github.com/openstreetmap/openstreetmap-website">Code</a></li> <li>Report an issue on <a rel="nofollow" class="external text" href="https://github.com/openstreetmap/openstreetmap-website/issues">GitHub</a>. For server, operational issues, see <a href="/wiki/Contact#Systems_administrators" class="mw-redirect" title="Contact">Contact#Systems administrators</a>.</li></ul> <h3><span id="Search.2C_geocoding_Nominatim"></span><span class="mw-headline" id="Search,_geocoding_Nominatim">Search, geocoding <a href="/wiki/Nominatim" title="Nominatim">Nominatim</a></span></h3> <ul><li><a class="external text" href="//nominatim.org/">Homepage</a></li> <li><a rel="nofollow" class="external text" href="//github.com/openstreetmap/Nominatim">Code</a></li> <li>Report an issue: at the maintainers's <a rel="nofollow" class="external text" href="//github.com/openstreetmap/Nominatim/issues">GitHub repository</a></li></ul> <h3><span id="Desktop_map_data_editor_JOSM_.28Java.29"></span><span class="mw-headline" id="Desktop_map_data_editor_JOSM_(Java)">Desktop map data editor <a href="/wiki/JOSM" title="JOSM">JOSM</a> (Java)</span></h3> <p>JOSM is one of the most popular and powerful OpenStreetMap editors. </p> <ul><li><a class="external text" href="https://josm.openstreetmap.de/wiki/DevelopersGuide">JOSM Developers Guide</a></li> <li><a class="external text" href="https://josm.openstreetmap.de/browser/josm/trunk">Code</a></li> <li><a class="external text" href="https://josm.openstreetmap.de/newticket">Report an Issue</a></li> <li><a rel="nofollow" class="external text" href="https://trac.openstreetmap.org/browser/subversion/applications/editors/josm/plugins">Code for Plugins</a></li></ul> <h3><span id="Online_map_data_editor_iD_.28Javascript.29"></span><span class="mw-headline" id="Online_map_data_editor_iD_(Javascript)">Online map data editor <a href="/wiki/ID" title="ID">iD</a> (Javascript)</span></h3> <p><a href="/wiki/ID" title="ID">iD</a> is the default editor for OpenStreetMap. Users can help by testing & reporting bugs, or tackling issues tagged <a rel="nofollow" class="external text" href="https://github.com/openstreetmap/iD/labels/good%20first%20issue">good-first-issue</a>. </p> <ul><li><a rel="nofollow" class="external text" href="https://github.com/openstreetmap/iD">Code</a></li> <li><a rel="nofollow" class="external text" href="https://github.com/openstreetmap/iD/issues">Report an Issue</a></li></ul> <h3><span class="mw-headline" id="Default_style_at_OSM.org">Default style at OSM.org</span></h3> <dl><dd><i>Main article:</i> <a href="/wiki/Standard_tile_layer" class="mw-redirect" title="Standard tile layer">Standard tile layer</a></dd></dl> <ul><li><a rel="nofollow" class="external text" href="https://github.com/gravitystorm/openstreetmap-carto">Code</a></li> <li><a rel="nofollow" class="external text" href="https://github.com/gravitystorm/openstreetmap-carto/issues">Report an Issue</a></li></ul> <p>Other map styles are separate, please see on their wiki pages or look at contact/license footers in a map display. </p> <h3><span id="Desktop_map_data_editor_Potlatch_3_.28ActionScript.29"></span><span class="mw-headline" id="Desktop_map_data_editor_Potlatch_3_(ActionScript)">Desktop map data editor <a href="/wiki/Potlatch" title="Potlatch">Potlatch 3</a> (ActionScript)</span></h3> <p>Its predecessor Potlatch 2 was the default editor for new OpenStreetMap users. You can also help by <a rel="nofollow" class="external text" href="http://translatewiki.net/w/i.php?title=Special:Translate&group=out-osm-potlatch2-main">contributing translations</a> (Note that new translations are currently not added to the editor). </p> <ul><li><a rel="nofollow" class="external text" href="https://github.com/systemed/potlatch3">systemed/potlatch3</a> <sup>GitHub</sup></li></ul> <h3><span id="OSM_data_processing_Swiss_Army_knife_Osmium_.28C.2B.2B.29"></span><span class="mw-headline" id="OSM_data_processing_Swiss_Army_knife_Osmium_(C++)">OSM data processing Swiss Army knife <a href="/wiki/Osmium" title="Osmium">Osmium</a> (C++)</span></h3> <p><i>Osmium</i> (also known as Libosmium) is a Swiss Army knife for processing OpenStreetMap data. It is a library to read and write OpenStreetMap data and serves as a base for other projects such as Osm2pgsql. </p> <ul><li><a rel="nofollow" class="external text" href="https://osmcode.org/libosmium/">Library documentation</a></li> <li><a rel="nofollow" class="external text" href="https://github.com/osmcode/libosmium">Code and bug tracker</a></li></ul> <p><i>Osmium Tool</i> is a command line programme to convert OSM data between file formats, inspect files, apply updates to files and generate spatial or thematic extracts. </p> <ul><li><a rel="nofollow" class="external text" href="https://osmcode.org/osmium-tool/">Osmium Tool documentation</a></li> <li><a rel="nofollow" class="external text" href="https://github.com/osmcode/osmium-tool">Code and bug tracker</a></li></ul> <p><a rel="nofollow" class="external text" href="https://osmcode.org/pyosmium/">Pyosmium</a> provides the Python bindings of Osmium and offers an easy method to keep a local OSM planet dumps up to date. </p> <h3><span id="OSM_data_processing_swiss_army_knife_Osmosis_.28Java.29"></span><span class="mw-headline" id="OSM_data_processing_swiss_army_knife_Osmosis_(Java)">OSM data processing swiss army knife <a href="/wiki/Osmosis" title="Osmosis">Osmosis</a> (Java)</span></h3> <p>Osmosis is our swiss army knife for processing OpenStreetMap data. <b>Documentation and testing</b> are especially welcome here. </p> <ul><li><a rel="nofollow" class="external text" href="https://github.com/openstreetmap/osmosis">Code</a></li> <li><a class="external text" href="https://lists.openstreetmap.org/listinfo/osmosis-dev">Report an Issue</a></li></ul> <h3><span id="OSM_data_importer_for_rendering_or_geocoding_osm2pgsql_.28C.2B.2B.29"></span><span class="mw-headline" id="OSM_data_importer_for_rendering_or_geocoding_osm2pgsql_(C++)">OSM data importer for rendering or geocoding <a href="/wiki/Osm2pgsql" title="Osm2pgsql">osm2pgsql</a> (C++)</span></h3> <p>osm2pgsql a powertool for importing <a href="/wiki/OSM_XML" title="OSM XML">OSM XML</a> files into <a href="/wiki/PostGIS" title="PostGIS">PostGIS</a> databases. <b>Documentation and testing</b> are especially welcome here. </p> <ul><li><a rel="nofollow" class="external text" href="https://github.com/openstreetmap/osm2pgsql">Code</a></li> <li>Report an issue on <a rel="nofollow" class="external text" href="https://github.com/openstreetmap/osm2pgsql/issues">GitHub</a></li></ul> <h3><span id="OSM_data_importer_for_analytics_openstreetmap_h3_.28Java.29"></span><span class="mw-headline" id="OSM_data_importer_for_analytics_openstreetmap_h3_(Java)">OSM data importer for analytics <a href="/wiki/Openstreetmap_h3" title="Openstreetmap h3">openstreetmap_h3</a> (Java)</span></h3> <p>openstreetmap_h3 a high performance tool for importing <a href="/wiki/OSM_PBF" class="mw-redirect" title="OSM PBF">OSM PBF</a> files into <a href="/wiki/PostGIS" title="PostGIS">PostGIS</a> databases or into Big Data ecosystem via Apache Arrow data format(and Apache Parquet after custom post processing). </p> <ul><li><a rel="nofollow" class="external text" href="https://github.com/igor-suhorukov/openstreetmap_h3">Code</a></li> <li>Report an issue on <a rel="nofollow" class="external text" href="https://github.com/igor-suhorukov/openstreetmap_h3/issues">GitHub</a></li></ul> <h3><span id="OSM_database_toolkit_GeoDesk_.28Java.2C_Python_and_C.2B.2B.29"></span><span class="mw-headline" id="OSM_database_toolkit_GeoDesk_(Java,_Python_and_C++)">OSM database toolkit <a href="/wiki/GeoDesk" title="GeoDesk">GeoDesk</a> (Java, Python and C++)</span></h3> <p>GeoDesk is a fast and storage-efficient database engine specifically designed for OSM data analysis. The open-source toolkit provides a command-line utility for creating and querying <a href="/wiki/Geographic_Object_Library" title="Geographic Object Library">Geographic Object Libraries</a>, as well as APIs for Java, Python and C++ (cross-platform). </p> <ul><li>Code: <a rel="nofollow" class="external text" href="https://github.com/clarisma/geodesk">Java</a>, <a rel="nofollow" class="external text" href="https://github.com/clarisma/geodesk-py">Python</a>, <a rel="nofollow" class="external text" href="https://github.com/clarisma/libgeodesk">C++</a>,</li> <li><a rel="nofollow" class="external text" href="https://docs.geodesk.com">Documentation</a></li></ul> <h3><span id="Slippy_map_library_Leaflet_.28JavaScript.29"></span><span class="mw-headline" id="Slippy_map_library_Leaflet_(JavaScript)">Slippy map library <a href="/wiki/Leaflet" title="Leaflet">Leaflet</a> (JavaScript)</span></h3> <p>Provides the general <a href="/wiki/Slippy_Map" class="mw-redirect" title="Slippy Map">slippy map</a> interface. <b>Javascript whizzes</b> can help us make the home page's maps even faster. </p> <ul><li><a class="external text" href="http://leafletjs.com/">Home page</a></li> <li><a rel="nofollow" class="external text" href="https://github.com/Leaflet/Leaflet">Code</a></li> <li><a rel="nofollow" class="external text" href="https://github.com/Leaflet/Leaflet/issues">Report an issue</a></li></ul> <h3><span id="Map_rendering_with_Mapnik_.28C.2B.2B.29"></span><span class="mw-headline" id="Map_rendering_with_Mapnik_(C++)">Map rendering with <a href="/wiki/Mapnik" title="Mapnik">Mapnik</a> (C++)</span></h3> <p>The main backend for the rendering of the maps that are produced from OSM data. </p> <ul><li><a rel="nofollow" class="external text" href="http://mapnik.org/">Home page</a></li> <li><a rel="nofollow" class="external text" href="http://github.com/mapnik/mapnik/">Code</a></li> <li><a rel="nofollow" class="external text" href="http://github.com/mapnik/mapnik/issues">Report an issue</a></li></ul> <h3><span id="Tile_rendering_system_with_Tirex_.28C.2B.2B_and_Perl.29"></span><span class="mw-headline" id="Tile_rendering_system_with_Tirex_(C++_and_Perl)">Tile rendering system with <a href="/wiki/Tirex" title="Tirex">Tirex</a> (C++ and Perl)</span></h3> <ul><li><a rel="nofollow" class="external text" href="https://github.com/openstreetmap/tirex/">Source code and issue tracker</a></li></ul> <p>See also <a href="/wiki/Tirex/Development" title="Tirex/Development">Tirex/Development</a> and <a href="/wiki/Tirex/Internals" title="Tirex/Internals">Tirex/Internals</a> </p> <h3><span class="mw-headline" id="And_other...">And other...</span></h3> <p>There are many many many projects powering OpenStreetMap ecosystem, many of them open source and welcoming contributions. Not all are listed on this specific page, see <a href="/wiki/Software" title="Software">Software</a> for more thorough listings. Look also at "About" page of your favourite OSM software - maybe it mentions its repository where you can contribute? </p> <h2><span class="mw-headline" id="Related_topics">Related topics</span></h2> <p><br /> </p> <div style="display: flex; flex-direction: row; flex-wrap: wrap;"> <div style="display: flex; flex-direction: column; flex: 1 1 25em;"> <div style="margin: 0.5em 0.5em 1em 0.5em; background: #eaf3ff; flex: 0 1 auto; ;"> <div style="background: #36c; padding: 0.5em 1em 0.5em 1em;" class="titre"><span style="color: #FFF; font-weight: bold;">OpenStreetMap Platform</span> </div> <div style="padding: 0.5em 1em 0.5em 1em;"><div style="clear:both"></div> <table> <caption> </caption> <tbody><tr> <th style="text-align:left;font-size:120%">Data </th> <td><a href="/wiki/Elements" title="Elements">Elements</a> • <a href="/wiki/XML_Schema" class="mw-redirect" title="XML Schema">XML Schema</a> • <a href="/wiki/Planet.osm" title="Planet.osm">Data Dumps</a> • <a href="/wiki/OSM_file_formats" title="OSM file formats">File Formats</a> • <a href="/wiki/Converting_map_data_between_formats" title="Converting map data between formats">Converting</a> • <a href="/wiki/Planet.gpx" title="Planet.gpx">GPS Traces</a> </td></tr> <tr> <th style="text-align:left;font-size:120%"><a href="/wiki/API" title="API">API</a> </th> <td><a href="/wiki/API_0.6" class="mw-redirect" title="API 0.6">Documentation</a> • <a href="/wiki/APIs" class="mw-redirect" title="APIs">Alternative APIs</a> </td></tr> <tr> <th style="text-align:left;font-size:120%">Website </th> <td><a href="/wiki/The_Rails_Port" class="mw-redirect" title="The Rails Port">Server Application</a> • <a href="/wiki/Web_front_end" title="Web front end">Web Frontend</a> • <a href="/wiki/Database" title="Database">Database</a> • <a href="/wiki/Component_Overview" class="mw-redirect" title="Component Overview">Component Overview</a> </td></tr> <tr> <th style="text-align:left;font-size:120%">To Do </th> <td><a href="/wiki/Top_Ten_Tasks" title="Top Ten Tasks">Top Ten Tasks</a> </td></tr> <tr> <th style="text-align:left;font-size:120%">Admin </th> <td><a href="/wiki/Servers" title="Servers">Servers</a> • <a href="/wiki/Using_the_dev_server" title="Using the dev server">Dev Server</a> • <a rel="nofollow" class="external text" href="https://apis.dev.openstreetmap.org/">Testing APIs</a> </td></tr></tbody></table><div style="clear:both"></div></div> </div> </div> <div style="display: flex; flex-direction: column; flex: 1 1 25em;"> <div style="margin: 0.5em 0.5em 1em 0.5em; background: #eaf3ff; flex: 0 1 auto; ;"> <div style="background: #36c; padding: 0.5em 1em 0.5em 1em;" class="titre"><span style="color: #FFF; font-weight: bold;">Using OpenStreetMap for Development</span> </div> <div style="padding: 0.5em 1em 0.5em 1em;"><div style="clear:both"></div> <table> <caption> </caption> <tbody><tr> <th style="text-align:left;font-size:120%">Embed </th> <td><a href="/wiki/Deploying_your_own_Slippy_Map" title="Deploying your own Slippy Map">Showing a Map</a> • <a href="/wiki/Export" title="Export">Export</a> </td></tr> <tr> <th style="text-align:left;font-size:120%"><a href="/wiki/Rendering" title="Rendering">Render</a> </th> <td><a href="/wiki/Creating_your_own_tiles" title="Creating your own tiles">Your own tiles</a> • <a href="/wiki/3D_Development" class="mw-redirect" title="3D Development">3D</a> • <a href="/wiki/OSM_on_Paper" title="OSM on Paper">Print</a> • <a href="/wiki/WMS" title="WMS">WMS</a> • <a href="/wiki/TMS" title="TMS">TMS</a> </td></tr> <tr> <th style="text-align:left;font-size:120%"><a href="/wiki/List_of_OSM_based_Services" class="mw-redirect" title="List of OSM based Services">Services</a> </th> <td><a href="/wiki/Routing" title="Routing">Routing/navigation</a> • <a href="/wiki/Search_engines" title="Search engines">Search/geocoding</a> </td></tr> <tr> <th style="text-align:left;font-size:120%">Programming </th> <td><a href="/wiki/Software_libraries" title="Software libraries">Software libraries</a> • <a href="/wiki/Databases_and_data_access_APIs" title="Databases and data access APIs">Using a Database</a> </td></tr> <tr> <th style="text-align:left;font-size:120%">Other </th> <td><a href="/wiki/Research" title="Research">Science Research</a> • <a href="/wiki/Books" title="Books">Books</a> • <a href="/wiki/Companies" class="mw-redirect" title="Companies">Companies</a> • <a href="/wiki/Related_Projects" class="mw-redirect" title="Related Projects">Related Projects</a> </td></tr></tbody></table><div style="clear:both"></div></div> </div> </div> </div> <p><br /> </p> <h2><span class="mw-headline" id="See_also">See also</span></h2> <ul><li><a href="/wiki/Google_Summer_of_Code" title="Google Summer of Code">Google Summer of Code</a> and <a href="/wiki/NLnet" title="NLnet">NLnet</a> - programs that may financially support some contributors to open source projects, including OSM ones.</li> <li><a href="/wiki/Open_Historical_Map/Development" class="mw-redirect" title="Open Historical Map/Development">OpenHistoricalMap development</a>, which is based on forks of many of the projects above</li></ul> <h2><span class="mw-headline" id="External_links">External links</span></h2> <ul><li><a class="external text" href="https://community.openstreetmap.org/t/good-open-source-projects-for-new-contributors/104479">Discussion about good open-source projects for new contributors</a></li></ul>    </div> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://wiki.openstreetmap.org/w/index.php?title=Develop&oldid=2779189">https://wiki.openstreetmap.org/w/index.php?title=Develop&oldid=2779189</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Special:Categories" title="Special:Categories">Categories</a>: <ul><li><a href="/wiki/Category:Development" title="Category:Development">Development</a></li><li><a href="/wiki/Category:Portals" title="Category:Portals">Portals</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden category: <ul><li><a href="/wiki/Category:Translate_to_Esperanto" title="Category:Translate to Esperanto">Translate to Esperanto</a></li></ul></div></div> </div> </div> <div id="mw-navigation"> <h2>Navigation menu</h2> <div id="mw-head"> <nav id="p-personal" class="vector-menu mw-portlet mw-portlet-personal vector-user-menu-legacy" aria-labelledby="p-personal-label" role="navigation" > <h3 id="p-personal-label" class="vector-menu-heading " > <span class="vector-menu-heading-label">Personal tools</span> </h3> <div class="vector-menu-content"> <ul class="vector-menu-content-list"><li id="pt-uls" class="mw-list-item active"><a class="uls-trigger" href="#"><span>English</span></a></li><li id="pt-createaccount" class="mw-list-item"><a href="/w/index.php?title=Special:CreateAccount&returnto=Develop" title="You are encouraged to create an account and log in; 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