|For indicating the source of all tags added to the OSM database.|
|Used on these elements|
|Documented values: 9|
|Tools for this tag|
The source=* tag can be used to indicate the source of some information (i.e. meta data) added to OpenStreetMap. This tag could be useful for verification and to assist future editors who may wish to understand the origins of the data they are modifying.
It is often preferable to use separate source tags for each of the main tags, for example source:name=*, source:ref=*, source:addr=* detailing how the information for name, ref and address information was collected.
Note: For large edits the source tag can be added to the changeset tags rather than in the features themselves.
- In the Potlatch editor a source tag can be added to a feature by pressing 'b'.
How to use
Add a source tag detailing how the details were captured. Please also update the source information if you check or update a tag value based on a new survey. For example, a feature may have originally been captured from out-of-copyright imagery, being tagged 'source=NPE'. If you then later improve the alignment using Bing imagery then change the source value to 'source=Bing'. If a tag value is based on information derived from multiple sources use 'source=NPE;Bing' or similar.
Single source tag
A single source tag is used when all tags associated with a feature have the same source. For example:
- source=survey to indicate that all tags were added based on a survey
- source=Bing to indicate that all tags were added based on Bing Imagery.
If a feature has multiple tags you may want to make use of the source namespace to indicate precisely which tag your source refers to. For example:
- source:geometry=Bing to indicate that the geometry (shape and position) of an object was based on Bing Imagery.
- source:name=survey to indicate that the name was added based on a survey.
- source:name=OS Locator The name was derived from OS Opendata Locator.
- source:name=massgis The details were imported from a Massachusetts open data source
- source:name=cadastre-dgi-fr source : Direction Générale des Impôts - Cadastre. Mise à jour : 2011 The added from the 2011 version of the French Cadastre data.
- source:addr=* for address information.
Other tags exist or can be established within the source namespace.
A note about maxspeed
Note that source:maxspeed=* is frequently used to give information about the type of the speed limit. If you wish to tag both the type of the speed limit and also source information for how the information was collected then either use source:maxspeed in the way described on this page and use 'maxspeed:type' for the type of speed limit (for example maxspeed=40, source:maxspeed=survey source:maxspeed:date=2012-11-20 and maxspeed:type=sign would indicate that a numeric sign showed a speed limit of 40 km/h based on a ground survey done on 20 November 2012, or use source:maxspeed=*. Please note that currently most usages of source:maxspeed=* are indicating the type of maxspeed, and that by the time this tag was introduced there were 0 occurences of sources like documented here!
Commonly used sources:
|Bing||worldwide||Tracing of an old version (before Winter 2012) of Microsoft's map service Bing's aerial imagery (but not their actual maps)|
|Bing 2012||worldwide||Tracing of the current version (since Summer 2012) of Microsoft's map service Bing's aerial imagery (but not their actual maps). Note that it is still 2012 and not 2013 because of the age of the images.|
|common knowledge||worldwide||The OSM user knows this from many informal source and believes it to be commonly known by most people who care. For instance most people know that the huge ocean between Europe, Africa and the Americas is called the Atlantic.|
|cuzk:km||CZ||Manual or semi-automatic tracing of Czech catastral map||http://www.cuzk.cz|
|dictaphone||worldwide||The OSM user visited the place with a standalone voice recorder and described his observations, then later entered the data from voice playback|
|digitalglobe||worldwide||Traced DigitalGlobe / MapBox aerial imagery.||some use Mapbox as source, as suggested by MapBox themselves|
|extrapolation||worldwide||The information was extrapolated from other information, but is still better than pure guesswork|
|Fugro 2005||DK||Tracing of Fugro's aerial imagery from 2005||http://www.fugro.com/divisions/survey/geospatial-services/aerial-mapping|
|landsat||worldwide||Tracing of Landsat low resolution satellite imagery|
|local knowledge||worldwide||The OSM user has some affiliation with the area (resident, place of work, frequent visits...) and knows this first hand or from others in the area|
|photograph||worldwide||Information was photographed (not from the air or space)|
|survey||worldwide||see above in section "How To Use"|
|uhul:ortofoto||CZ||Usually manual tracing of grey-scale aerial imagery by Czech office for economic use of forests|
|yahoo||worldwide||Tracing of Yahoo's aerial imagery|
Tags used only by specific data import software:
|Scripted imports and automated edits should only be carried out by those with experience and understanding of the way the OpenStreetMap community creates maps, and only with careful planning and consultation with the local community.
See Import/Guidelines and Automated Edits code of conduct for more information.
|3dShapes||NL||3dShapes landuse and building shapes in The Netherlands and a bit across the border|
|AND||NL||Data donated in 2007 by AND Automotive Navigation Data, see the AND Data wiki page.|
|artem;bing||RU||See the wiki page.|
|BAG||NL||Address and building data from NL|
|cadastre-dgi-fr||FR||WikiProject France/Cadastre French catastre maps. Mostly buildings, road names, administrative boundaries, addresses|
|cuzk:ruian||CZ||Import source of addresses, buildings, parcels of land in the Czech Republic||http://www.ruian.cz|
|dibavod||CZ||Import source of water bodies in the Czech Republic||http://www.dibavod.cz|
|DOP_LVA||DE||source=DOP_LVA_BY_01 - (pilot scheme from 2008-12-12 to 2009-03-31) extending OSM by digital orthophotos provided by the land surveying office of Bavaria, Germany|
|Geobase_Import||worldwide||Geobase data. Mostly place names|
|HELP␣SERVICE␣-␣REMOTE␣SENSING...||CZ||Import source of some parts of road network in the Czech Republic||http://www.bnhelp.cz|
|IBGE||BR||IBGE Import. Brazilian federal data|
|kapor2||SK||Import of ways and buildings from cadastre data in Slovakia|||
|LSIB3||worldwide||international boundary from the Office of the Geographer and Global Issues (INR/GGI)|||
|NHD||US||National Hydrography Dataset. Imported rivers/lakes|
|NPS||US||US National Park Service Data.|
|OSAK||DK||Imported address data from official Danish source|
|PGS||wordwide||Prototype Global Shoreline. Low detail coastline generated from landsat imagery.|
|SanGIS␣Addresses␣Public␣Domain||San Diego U.S.||SanGIS government data|
|YahooJapan/ALPSMAP||JP||Information donated by Yahoo in Japan|
|source value||instances (change direction MM-YYYY of count)||meaning||short source||meaning contributor|
|cadastre-dgi-fr source : Direction Générale des Impôts - Cadastre. Mise à jour : 2010||>13.6 million ( Jan 2013)||see Cadastre||Government (France)||Ceyockey|
|cadastre-dgi-fr source : Direction Générale des Impôts - Cadastre. Mise à jour : 2011||>9.6 million ( Jan 2013)||see Cadastre||Government (France)||Ceyockey|
|cadastre-dgi-fr source : Direction Générale des Impôts - Cadastre ; mise à jour : 2012||>8.1 million (Jan 2013)||see Cadastre||Government (France)||Ceyockey|
|Bing (and "bing")||>7.9 million (Jan 2013)||Bing||Corporate (Microsoft)||Ceyockey|
|YahooJapan/ALPSMAP||>5.2 million ( Jan 2013)||see YahooJapanALPS Data||Corporate (Yahoo Japan)||value assigned at YahooJapanALPS Data/Highway|
|3dShapes||>4.6 million (unchanged Jan 2013)||3dShapes||Corporate (Object Vision)||value assigned at Import/Catalogue#Ongoing_Imports|
|PGS & PGS(could be inacurately)||~4.5 million (Jan 2013)||Prototype Global Shoreline||Government (United States)||Ceyockey|
|cadastre-dgi-fr source : Direction Générale des Impôts - Cadastre ; (M_or_m)ise à jour : 2009||>3.8 million (Jan 2013)||see Cadastre||Government (France)||Ceyockey|
|KSJ2||>2.8 million ( Jan 2013)||see Import/Catalogue/Japan KSJ2 Import||Government (Japan)||value assigned at Import/Catalogue#One-Time Imports|
|NRCan-CanVec-7.0||>2.8 million ( Jan 2013)||CanVec#CanVec 7||Government (Canada)||Ceyockey|
|cuzk:km||~2.5 million (Jan 2013)||Manual or semi-automatic tracing of Czech catastral map||Government (Czechoslovakia)||Ceyockey (consult to Tag:source=cuzk:km#Most common sources and their meaning|
|NRCan-CanVec-10.0||>2.4 million (Jan 2013)||Canvec#CanVec 10||Government (Canada)||Ceyockey|
|NHD||>2.2 million ( Jan 2013)||National Hydrography Dataset||Government (United States)||value assigned at Import/Catalogue#One-Time Imports|
|NRCan-CanVec-8.0||>2.1 million (Jan 2013)||CanVec#CanVec_8||Government (Canada)||Ceyockey|
|extraction vectorielle v1 cadastre-dgi-fr source : Direction Générale des Impôts - Cadas. Mise à jour : 2010||>2 million (Jan 2013)||see Cadastre||Government (France)||Ceyockey|
|OSAK (2010)||>1.9 million ( Jan 2013)||Address data released by Danish government.||Government (Denmark)||rasher (personal knowledge)|
|CanVec 6.0 - NRCan||>1.9 million (Jan 2013)||CanVec#CanVec 6||Government (Canada)||Ceyockey|
|kapor2||>1.7 million (Jan 2013)||WikiProject Slovakia/Sources#Cadastral map||Government (Slovakia)||Ceyockey|
|Regione Emillia Romagna||>1.1 million (Jan 2013)||IT:Emilia Romagna edificato||Government (Italy)||Ceyockey|
|survey||>0.8 million (Jan 2013)||Key:source||OSM editor||Ceyockey|
|cadastre-dgi-fr source : Direction Générale des Impôts - Cadastre ; mise à jour : 2008||>0.7 million (Jan 2013)||WikiProject France/Cadastre||Government (France)||ceyockey|