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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 events over the winter 2014-2015. We will at least do a bunch of social pub meet-ups, but may well list other types of interesting events on this page. Pub 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. Not so much going out and mapping London over the winter. We'll just be sitting around 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

Tue 31st Missing Maps

On Tuesday 31st March we have another Missing Maps Project event however it is SOLD OUT. But if you're interested...

  • Re-check the Eventbrite sign up to see if tickets have come available.
  • Sign up for email updates to avoid missing the next one, which will happen next month
  • If you have a bit of OpenStreetMap editing experience and you would like to teach others how to do it, we may be able to sneak you in. Contact Pete Masters to get on the OSM trainers list.

If you can't come along but would like to help from home, this section of LearnOSM will guide you through the 'why' and 'how to' of remote mapping. LearnOSM is the Humanitarian Openstreetmap guide to Mapping.

Missing Maps Training and mini Mapathons

Weekly sessions March weekly training sessions| Monday afternoons in the Christ Church Centre, Swanley (just inside the M25 at junction 3)

Sun 29th Mar - Clocks change

The clocks change. Winter ends. OpenStreetMappers throughout the UK emerge blinking into the sunlight for another year of map-making shinanigans.

Hack weekend

Details coming soon

We didn't have one in a while, but we are hatching plans for something (People like User:Matt).

In fact we're currently seeking a venue. We have a list of potential London event venues, which you're welcome to edit, but it would also be great if an organisation proactively expressed an interest in supporting us by hosting.

Tue 19th May Geomob

"OpenStreetMappy geomob". If you attend one #geomob event, attend this one! On Tuesday 19th geomob will have OpenStreetMap talks from Andy Allan and Grant Slater among others. Sign up on lanyrd:

Fri 22nd May - QGIS user group meeting

QGIS user group meeting during the day on Friday 22nd May. hosted at UCL. LIMITED TICKETS

Watch this space. New events will be announced here and on Twitter bird.svg @OSMLondon

Past events

This series of events followed on from London/Summer 2014 events

So far in this series:

Area Pub lanyrd What happened?
28th Oct Clerkenwell Skills Matter eb Missing Maps Party October 2014 HOT event.
31st Oct Kings X British Library eb 'Gotta Tag 'Em All!' - a digital maps Halloween tag-a-thon
7th Nov Bloomsbury LSHTM Missing Maps London Launch Party
7th Nov Kings X Guardian Offices Missing Maps Guardian Mapping
3rd Dec Bloomsbury UCL eb MyAccessible.EU Wheelmap mapping party + Drinks South Bank
15th Dec Clerkenwell Wallacespace eb Missing Maps Party London December 2014
18th Dec Paddington Monkey Puzzle [2] Christmas Party! photos
7th Jan Holborn Penderel's Oak [3] Pub meet-up no photos :-(
8th Jan Fenchurch Accenture Offices Humanitarian Missing Maps Project event,
13th Jan Bloomsbury UCL [4] geomob
22nd Jan City Crosse Keys [5] Pub meet-up. photos
27th Jan Moorgate British Red Cross Offices - Humanitarian Missing Maps Project event,
3rd Feb Oxford St Blue posts [6] Pub meet-up. photos
12 Feb The Strand Aimia Offices - Humanitarian Missing Maps Project event,
18th Feb Kings X The Parcel Yard [7] Pub meet-up. Forgot to take photos
24th Feb Bloomsbury Arup offices 'eb Humanitarian Missing Maps Project event,
3rd Mar Trafalgar Sq Lord Moon of Mall [8] Pub meet-up. Photos coming soon
19th Mar Shoreditch Campus London [9] Geomob including a talk by Felix Lamouroux developer of Trails App
25th Mar Holborn Penderel's Oak [10] Mapping Planning Meeting. Photos coming soon

This list is brought in from the London/Winter 2014-2015 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: