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London, Greater London
Latitude: (51.50847, Longitude: -0.12533
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London is a city in Greater London at latitude 51° 30′ 30″ North, longitude 0° 7′ 31″ West.


London is the capital city of the United Kingdom. Greater London is one of the nine regions of England and is divided into 32 London boroughs. For ceremonial purpose it excludes the City of London. It is the most populous city in Europe (over twice the population of Paris). All road distances to the destination "London" refer to Charing Cross.

See also Central London


Local User Group
OSM London Flag of the United Kingdom.svg
When: Fortnightly
Where: Different pub each time (map)
mailing list
no mailinglist
London mapping evenings 2011 Pimlico.jpg

A series of London pub meet-ups and mini mapping parties over the summer 2014. These events are free and open to all. We normally have a mixture of old OpenStreetMap hands and new people coming along to find out more. The events might include mapping, but mostly we'll just be sitting around in a pub having a friendly chat about little things like freeing the world's geo-data. We hope you'll join us! Everyone and anyone is welcome.

Upcoming Events

Oct 26th Clock change

End of the "summer"

Tue 28th Oct - HOT event

Hot logo with text.svg

The next Humanitarian OpenStreetMap Team event will be Tuesday 28th October hosted by Skillsmatter in Clerkenwell. (map) 18:00 to 21:00

This month, we are likely to be mapping an area of South Sudan in response to a request for support from MSF field staff in the country. Bring a laptop. Learn to edit OpenStreetMap and contribute to the life-saving work done by MSF, the Red Cross and others in the field. If you are an experienced OpenStreetMapper, please come along to share your knowledge and teach some new people to map!

Sign up on eventbrite (plus more details)

Oct 31st - British Library event

All day event at the British Library, "supported by" OpenStreetMap and WikimediaUK

The main purpose of the event is to get people involved in trying to find as many remaining digital maps as possible that are still ‘hiding’ amongst the million images in the British Library Flickr Commons collection. There will also be various other presentations and conversations around mapping, including a short into to OpenStreetMap!

details and sign up on eventbrite

Nov 4th QGIS group

Not strictly in London, but Maidenhead's pretty close. The QGIS user group meeting is a day long mini-conference on QGIS. ...featuring OSM data no-doubt

Nov 4th #geomob

Lots of interesting geo stuff, including several that make heavy use of OSM #geomob is an evening event that features several brief talks followed by disucsison at a nearby pub. This time it will be back at the BCS near Covent Garden.

Nov 20th PostGIS day

All day event all about PostGIS. At the BCS on Thursday November 20th

Nov 7th Missing Maps Project launch

A launch party for the Missing Maps Project, probably including a press event and a mapping party at the Guardian. More details to follow.

Future events

We'll use this wiki page to announce events, as well as Twitter bird.svg @OSMLondon . Announcements may come at short notice!

There’s lots of other events in London e.g. tech meet-up groups, for which OpenStreetMap is relevant. Please use the wiki to pro-actively coordinate the setting up of an “OpenStreetMap presence” at these events… or just go along (Other OSMers may or may not be there)

We’ve got a list of London event venues for future events of a non-pub format. Please add to that if you have ideas or if your organisation would like to host or sponsor an event!

Past events

This series of events follows on from London/Winter 2013-2014 events

So far in this series:

Area Pub lanyrd What happened?
3rd Apr Fitzrovia Green Man [2] photos? diary entry? photo tag
9th Apr Olympic Park the Crate [3] Ollie's pre event blog and cake, photos. 'harry mapping video,' harry diary
28th Apr Oxford St Blue Posts [4] photos, harry diary
3rd May Shorditch The ODI [5] 2014 London HOT Congo Mapathon photos HOT blog
14th May Baker Street The Metropolitan Bar [6] photos, harry diary
29th May Old St/Barbican Artillery Arms [7] photos, harry diary
23rd Jun Hoxton The Reliance [8] photos diary coming soon
3rd July Brixton Craft Beer [9] photos harry diary
8th July Shoreditch ODI f (HOT meet-up) harry diary
19th July Crystal Palace Food market Tom Chance's OSM stall
22nd July Paddington Monkey Puzzle [10] diary entry & photos coming soon
29th July Holborn [11] Missing maps party july 2014 HOT meet-up at MSFUK office
9th Aug Old St/Barbican Artillery Arms [12] OpenStreetMap 10th Anniversary Birthday party + wikimania weekend, harry diary
20th Aug Bond St Iron Duke [13] photos & diary entry coming soon
26th Aug Moorgate Red Cross offices eb Missing Maps Party August 2014 humanitarian mapping evening. photos
5th Sept Holborn Penderel's Oak [14] photos & diary entry coming soon
30th Sept Clerkenwell Skills Matter eb Missing Maps Party September 2014 HOT event.
7th Oct Euston Bree Louise [15] photos

This list is brought in from the London/Summer 2014 events wiki page (where you can make edits)

OSM Coverage


OpenStreetMap has usable coverage of London and areas within the M25. The coverage density is not as much as the 208 most densely mapped meta tiles in 2013[1]: however, we have mapped nearly all roads and a lot of other features within the M25.

In the early days, we used Yahoo imagery in addition to GPS tracks to sketch in the features, and then add names from Ordnance Survey data. There are some areas which do not have enough detail from surveys and other open data, but in the early days it was worse, with areas around Hillingdon north of Heathrow glowing red on the NoName map. Today, we can use ITO Map to see where we could do a bit more surveying.

For a long time, we have had complete coverage of the London Underground, allowing us to render a Tube Network Map with small details such as track configurations, tunnels and bridges: our List of London Underground stations gives a raw list of stations as we originally surveyed them through GPS. We also have a strong coverage for stations and lines for DLR, Tramlink, London Overground and National Rail networks, and good coverage of most bus routes in London with the help of NaPTAN.

London also has good coverage of specialised information: Amaroussi has added and maintained Street light information for nearly all classified roads, Welshie has been doing most of the speed limits, while other users are adding lanes, sidewalks, surfaces, trees and even the London Congestion Charge.

  1. Mapping London's bus routes will remain a large and ongoing process, because Transport for London frequently alters bus routes to cater for changing demand.
  2. Add the Low Emission Zone.
  3. The public transport scheme is now live, meaning that we will have to update the network: we have to complete the London public transport tagging scheme soon, so that all modes to ensure routing integration and cross-compatibility between the new and old schemes.
  4. Add missing speed cameras and turn restrictions. They are important if OpenStreetMap is going to be a usable backbone for routing devices.
  5. OpenStreetMap is 10 years old this year, and urban regeneration is rendering some areas out of date: for example, the Heygate Estate in Southwark is being demolished and the Alma Estate in Ponders End will follow from next year.

London Boroughs

London is subdivided into 32 boroughs. Within our data we see these represented as admin boundaries, which are now all mapped out. See London borough boundaries for details and links to these.

London boroughs are also UK local councils of course, and with all of these it would be fantastic to see them making use of open geodata from OpenStreetMap, working with our community to supply change updates, or partnering with us to engage local communities via the process of OpenStreetMapping.

We could create wiki pages about the London boroughs.

Barking and Dagenham, Barnet, Bexley, Brent, Bromley, Camden, Croydon, Ealing, Enfield, Greenwich, Hackney, Hammersmith and Fulham, Haringey, Harrow, Havering, Hillingdon, Hounslow, Islington, Kensington and Chelsea, Kingston upon Thames, Lambeth, Lewisham, City of London, Merton, Newham, Redbridge, Richmond upon Thames, Southwark, Sutton, Tower Hamlets, Waltham Forest, Wandsworth, Westminster

…but note that wiki pages about small areas can fall into disuse quite easily, so don’t be too ambitious with info requiring updates. The London boroughs might be a useful subdivision for tracking mapping progress, but probably not through manual updating of wiki pages. One automated tool which uses the subdivision to good effect already is the OSM and OSL differences analysis e.g. see the report for Camden

Out-of-copyright maps of London

There are some Out-of-copyright maps which feature London at low details levels. The most detailed is Richard's scans of the 1933/34 ABC Street Atlas of London (Torrent) (Alternative). Back in the early days (2007) we were able to try and use these to fill in some London details, or at least help us not get lost while we mapped London ourselves! These days there's nothing we can learn from them which isn't already better mapped in OpenStreetMap.

Related projects


  1. (accessed 15 July 2014).

See also: