Alexander Brett

Visualising London

01 June 2016

I recently started working on a couple of interesting data-visualisation projects at work, which lead me to researching visualisation libraries, watching this video, and thinking that it would be cool to do something like that for London.

Happily, data.london.gov.uk exists and has a bizarrely good selection of datasets, so I threw together the following visualisation tool to provide a little window into the state of London, ward-by-ward.

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Abbey 1.3sq. km Barking and DagenhamAlibon 1.4sq. km Barking and DagenhamBecontree 1.3sq. km Barking and DagenhamChadwell Heath 3.4sq. km Barking and DagenhamEastbrook 3.5sq. km Barking and DagenhamEastbury 1.4sq. km Barking and DagenhamGascoigne 1.1sq. km Barking and DagenhamGoresbrook 1.3sq. km Barking and DagenhamHeath 2sq. km Barking and DagenhamLongbridge 1.6sq. km Barking and DagenhamMayesbrook 1.9sq. km Barking and DagenhamParsloes 1.2sq. km Barking and DagenhamRiver 3.5sq. km Barking and DagenhamThames 7.9sq. km Barking and DagenhamValence 1.3sq. km Barking and DagenhamVillage 2.1sq. km Barking and DagenhamWhalebone 1.6sq. km Barking and DagenhamBrunswick Park 3.2sq. km BarnetBurnt Oak 2.1sq. km BarnetChilds Hill 3.1sq. km BarnetColindale 2.6sq. km BarnetCoppetts 2.7sq. km BarnetEast Barnet 3.7sq. km BarnetEast Finchley 2.5sq. km BarnetEdgware 5.6sq. km BarnetFinchley Church End 2.7sq. km BarnetGarden Suburb 4.7sq. km BarnetGolders Green 3sq. km BarnetHale 5.4sq. km BarnetHendon 2.8sq. km BarnetHigh Barnet 8.3sq. km BarnetMill Hill 9.4sq. km BarnetOakleigh 3.3sq. km BarnetTotteridge 8.8sq. km BarnetUnderhill 4.6sq. km BarnetWest Finchley 2.2sq. km BarnetWest Hendon 3.4sq. km BarnetWoodhouse 2.6sq. km BarnetBarnehurst 2.9sq. km BexleyBelvedere 3.2sq. km BexleyBlackfen and Lamorbey 1.7sq. km BexleyBlendon and Penhill 2.1sq. km BexleyBrampton 2sq. km BexleyChristchurch 2.6sq. km BexleyColyers 1.6sq. km BexleyCrayford 4sq. km BexleyCray Meadows 7.2sq. km BexleyDanson Park 2.7sq. km BexleyEast Wickham 2.2sq. km BexleyErith 4.8sq. km BexleyFalconwood and Welling 1.7sq. km BexleyLesnes Abbey 2.4sq. km BexleyLonglands 2.6sq. km BexleyNorth End 5.7sq. km BexleyNorthumberland Heath 1.8sq. km BexleySt. Mary's 4.4sq. km BexleySt. Michael's 1.4sq. km BexleySidcup 2.7sq. km BexleyThamesmead East 4.8sq. km BexleyAlperton 2.1sq. km BrentBarnhill 3sq. km BrentBrondesbury Park 1.7sq. km BrentDollis Hill 2.3sq. km BrentDudden Hill 1.7sq. km BrentFryent 2.7sq. km BrentHarlesden 1.1sq. km BrentKensal Green 1.1sq. km BrentKenton 2.2sq. km BrentKilburn 0.9sq. km BrentMapesbury 1.4sq. km BrentNorthwick Park 2.7sq. km BrentPreston 2.4sq. km BrentQueens Park 1.5sq. km BrentQueensbury 2.1sq. km BrentStonebridge 4.1sq. km BrentSudbury 2.1sq. km BrentTokyngton 2.8sq. km BrentWelsh Harp 2.3sq. km BrentWembley Central 1.6sq. km BrentWillesden Green 1.5sq. km BrentBickley 4.9sq. km BromleyBiggin Hill 8.3sq. km BromleyBromley Common and Keston 8.3sq. km BromleyBromley Town 3.7sq. km BromleyChelsfield and Pratts Bottom 12.6sq. km BromleyChislehurst 10.4sq. km BromleyClock House 2.3sq. km BromleyCopers Cope 3.3sq. km BromleyCray Valley East 13.3sq. km BromleyCray Valley West 3.9sq. km BromleyCrystal Palace 2.3sq. km BromleyDarwin 29sq. km BromleyFarnborough and Crofton 7sq. km BromleyHayes and Coney Hall 10.8sq. km BromleyKelsey and Eden Park 5.2sq. km BromleyMottingham and Chislehurst North 2.4sq. km BromleyOrpington 4.3sq. km BromleyPenge and Cator 3sq. km BromleyPetts Wood and Knoll 4.3sq. km BromleyPlaistow and Sundridge 4sq. km BromleyShortlands 2.5sq. km BromleyWest Wickham 4.4sq. km BromleyBelsize 0.8sq. km CamdenBloomsbury 1sq. km CamdenCamden Town with Primrose Hill 1.2sq. km CamdenCantelowes 0.8sq. km CamdenFortune Green 1sq. km CamdenFrognal and Fitzjohns 1.5sq. km CamdenGospel Oak 0.7sq. km CamdenHampstead Town 2.4sq. km CamdenHaverstock 0.7sq. km CamdenHighgate 3.2sq. km CamdenHolborn and Covent Garden 1.2sq. km CamdenKentish Town 1sq. km CamdenKilburn 0.7sq. km CamdenKing's Cross 0.6sq. km CamdenRegent's Park 1.3sq. km CamdenSt. Pancras and Somers Town 1.4sq. km CamdenSwiss Cottage 1.3sq. km CamdenWest Hampstead 0.9sq. km CamdenAddiscombe 1.6sq. km CroydonAshburton 2.7sq. km CroydonBensham Manor 1.4sq. km CroydonBroad Green 2.7sq. km CroydonCoulsdon East 7.7sq. km CroydonCoulsdon West 5sq. km CroydonCroham 3.5sq. km CroydonFairfield 3.8sq. km CroydonFieldway 1.5sq. km CroydonHeathfield 8.7sq. km CroydonKenley 6.5sq. km CroydonNew Addington 2.4sq. km CroydonNorbury 2.5sq. km CroydonPurley 4.2sq. km CroydonSanderstead 6.3sq. km CroydonSelhurst 2.3sq. km CroydonSelsdon and Ballards 6.4sq. km CroydonShirley 2.8sq. km CroydonSouth Norwood 2.4sq. km CroydonThornton Heath 1.7sq. km CroydonUpper Norwood 2.6sq. km CroydonWaddon 3.6sq. km CroydonWest Thornton 2sq. km CroydonWoodside 2.2sq. km CroydonActon Central 1.8sq. km EalingCleveland 2.2sq. km EalingDormers Wells 2.3sq. km EalingEaling Broadway 1.9sq. km EalingEaling Common 2.1sq. km EalingEast Acton 4.3sq. km EalingElthorne 2sq. km EalingGreenford Broadway 2.5sq. km EalingGreenford Green 3.4sq. km EalingHanger Hill 3.3sq. km EalingHobbayne 2.2sq. km EalingLady Margaret 1.5sq. km EalingNorthfield 1.5sq. km EalingNorth Greenford 3.3sq. km EalingNortholt Mandeville 2.8sq. km EalingNortholt West End 3.5sq. km EalingNorwood Green 3.8sq. km EalingPerivale 3.4sq. km EalingSouth Acton 1.7sq. km EalingSouthall Broadway 1.6sq. km EalingSouthall Green 1.6sq. km EalingSouthfield 1.4sq. km EalingWalpole 1.5sq. km EalingBowes 1.5sq. km EnfieldBush Hill Park 2.5sq. km EnfieldChase 16.9sq. km EnfieldCockfosters 10.4sq. km EnfieldEdmonton Green 3.1sq. km EnfieldEnfield Highway 4.6sq. km EnfieldEnfield Lock 3.3sq. km EnfieldGrange 3.3sq. km EnfieldHaselbury 1.8sq. km EnfieldHighlands 5.1sq. km EnfieldJubilee 3.9sq. km EnfieldLower Edmonton 2.2sq. km EnfieldPalmers Green 1.9sq. km EnfieldPonders End 3.5sq. km EnfieldSouthbury 2.9sq. km EnfieldSouthgate 2.7sq. km EnfieldSouthgate Green 2.6sq. km EnfieldTown 2.2sq. km EnfieldTurkey Street 2.3sq. km EnfieldUpper Edmonton 2.6sq. km EnfieldWinchmore Hill 2.8sq. km EnfieldAbbey Wood 2.7sq. km GreenwichBlackheath Westcombe 2.1sq. km GreenwichCharlton 2sq. km GreenwichColdharbour and New Eltham 2.5sq. km GreenwichEltham North 2.6sq. km GreenwichEltham South 4.6sq. km GreenwichEltham West 2.4sq. km GreenwichGlyndon 1.7sq. km GreenwichGreenwich West 2.8sq. km GreenwichKidbrooke with Hornfair 2.4sq. km GreenwichMiddle Park and Sutcliffe 3.3sq. km GreenwichPeninsula 4.5sq. km GreenwichPlumstead 2.3sq. km GreenwichShooters Hill 3.8sq. km GreenwichThamesmead Moorings 4.8sq. km GreenwichWoolwich Common 2.6sq. km GreenwichWoolwich Riverside 3.3sq. km GreenwichAddison 0.6sq. km Hammersmith and FulhamAskew 0.8sq. km Hammersmith and FulhamAvonmore and Brook Green 0.9sq. km Hammersmith and FulhamCollege Park and Old Oak 3.4sq. km Hammersmith and FulhamFulham Broadway 0.7sq. km Hammersmith and FulhamFulham Reach 0.9sq. km Hammersmith and FulhamHammersmith Broadway 1.1sq. km Hammersmith and FulhamMunster 0.6sq. km Hammersmith and FulhamNorth End 0.6sq. km Hammersmith and FulhamPalace Riverside 1.5sq. km Hammersmith and FulhamParsons Green and Walham 0.9sq. km Hammersmith and FulhamRavenscourt Park 1.2sq. km Hammersmith and FulhamSands End 1.4sq. km Hammersmith and FulhamShepherd's Bush Green 1.1sq. km Hammersmith and FulhamTown 0.7sq. km Hammersmith and FulhamWormholt and White City 0.9sq. km Hammersmith and FulhamAlexandra 2.6sq. km HaringeyBounds Green 1.4sq. km HaringeyBruce Grove 0.9sq. km HaringeyCrouch End 1.4sq. km HaringeyFortis Green 2sq. km HaringeyHarringay 1.6sq. km HaringeyHighgate 2.5sq. km HaringeyHornsey 1.1sq. km HaringeyMuswell Hill 1.7sq. km HaringeyNoel Park 1.2sq. km HaringeyNorthumberland Park 1.9sq. km HaringeySt. Ann's 1.1sq. km HaringeySeven Sisters 1.3sq. km HaringeyStroud Green 1.1sq. km HaringeyTottenham Green 1.4sq. km HaringeyTottenham Hale 1.9sq. km HaringeyWest Green 1.4sq. km HaringeyWhite Hart Lane 1.7sq. km HaringeyWoodside 1.5sq. km HaringeyBelmont 1.8sq. km HarrowCanons 5.6sq. km HarrowEdgware 1.4sq. km HarrowGreenhill 1.7sq. km HarrowHarrow on the Hill 3.6sq. km HarrowHarrow Weald 4.6sq. km HarrowHatch End 3.3sq. km HarrowHeadstone North 3.3sq. km HarrowHeadstone South 1.5sq. km HarrowKenton East 1.3sq. km HarrowKenton West 1.8sq. km HarrowMarlborough 1.6sq. km HarrowPinner 3.3sq. km HarrowPinner South 2.3sq. km HarrowQueensbury 1.6sq. km HarrowRayners Lane 1.5sq. km HarrowRoxbourne 1.5sq. km HarrowRoxeth 1.6sq. km HarrowStanmore Park 4.5sq. km HarrowWealdstone 1.2sq. km HarrowWest Harrow 1.5sq. km HarrowBrooklands 4.2sq. km HaveringCranham 6.6sq. km HaveringElm Park 3.7sq. km HaveringEmerson Park 4.6sq. km HaveringGooshays 7.8sq. km HaveringHacton 2.5sq. km HaveringHarold Wood 7.6sq. km HaveringHavering Park 9.8sq. km HaveringHeaton 3.4sq. km HaveringHylands 2.9sq. km HaveringMawneys 3sq. km HaveringPettits 4sq. km HaveringRainham and Wennington 16.9sq. km HaveringRomford Town 2.9sq. km HaveringSt. Andrew's 2.7sq. km HaveringSouth Hornchurch 6.9sq. km HaveringSquirrel's Heath 2.7sq. km HaveringUpminster 22.5sq. km HaveringBarnhill 2.1sq. km HillingdonBotwell 4.4sq. km HillingdonBrunel 3.3sq. km HillingdonCavendish 2sq. km HillingdonCharville 3sq. km HillingdonEastcote and East Ruislip 4.1sq. km HillingdonHarefield 15.2sq. km HillingdonHeathrow Villages 23.5sq. km HillingdonHillingdon East 3.6sq. km HillingdonIckenham 6.2sq. km HillingdonManor 2sq. km HillingdonNorthwood 7.4sq. km HillingdonNorthwood Hills 3.3sq. km HillingdonPinkwell 2.7sq. km HillingdonSouth Ruislip 7.4sq. km HillingdonTownfield 3.5sq. km HillingdonUxbridge North 4.6sq. km HillingdonUxbridge South 3.1sq. km HillingdonWest Drayton 3.5sq. km HillingdonWest Ruislip 4.4sq. km HillingdonYeading 2.3sq. km HillingdonYiewsley 4sq. km HillingdonBedfont 4.4sq. km HounslowBrentford 3.2sq. km HounslowChiswick Homefields 2.3sq. km HounslowChiswick Riverside 2.1sq. km HounslowCranford 2.7sq. km HounslowFeltham North 3.4sq. km HounslowFeltham West 3.2sq. km HounslowHanworth 3.2sq. km HounslowHanworth Park 3.7sq. km HounslowHeston Central 1.7sq. km HounslowHeston East 2.1sq. km HounslowHeston West 3.8sq. km HounslowHounslow Central 1.7sq. km HounslowHounslow Heath 2.8sq. km HounslowHounslow South 1.8sq. km HounslowHounslow West 1.6sq. km HounslowIsleworth 2sq. km HounslowOsterley and Spring Grove 6.3sq. km HounslowSyon 2.9sq. km HounslowTurnham Green 1.8sq. km HounslowBarnsbury 0.8sq. km IslingtonBunhill 1.1sq. km IslingtonCaledonian 1.1sq. km IslingtonCanonbury 0.8sq. km IslingtonClerkenwell 0.9sq. km IslingtonFinsbury Park 0.9sq. km IslingtonHighbury East 1sq. km IslingtonHighbury West 1.1sq. km IslingtonHillrise 0.8sq. km IslingtonHolloway 1sq. km IslingtonJunction 1sq. km IslingtonMildmay 0.8sq. km IslingtonSt. George's 0.8sq. km IslingtonSt. Mary's 0.9sq. km IslingtonSt. Peter's 0.8sq. km IslingtonTollington 0.8sq. km IslingtonAlexandra 2.7sq. km Kingston upon ThamesBerrylands 1.5sq. km Kingston upon ThamesBeverley 1.9sq. km Kingston upon ThamesCanbury 1.2sq. km Kingston upon ThamesChessington North and Hook 1.9sq. km Kingston upon ThamesChessington South 7.6sq. km Kingston upon ThamesCoombe Hill 4.4sq. km Kingston upon ThamesCoombe Vale 1.6sq. km Kingston upon ThamesGrove 1.9sq. km Kingston upon ThamesNorbiton 1.3sq. km Kingston upon ThamesOld Malden 1.8sq. km Kingston upon ThamesSt. James 2.2sq. km Kingston upon ThamesSt. Mark's 1.4sq. km Kingston upon ThamesSurbiton Hill 1.7sq. km Kingston upon ThamesTolworth and Hook Rise 2.6sq. km Kingston upon ThamesTudor 1.6sq. km Kingston upon ThamesBishop's 1.5sq. km LambethBrixton Hill 1.1sq. km LambethClapham Common 1.3sq. km LambethClapham Town 1.1sq. km LambethColdharbour 1.2sq. km LambethFerndale 0.9sq. km LambethGipsy Hill 1.6sq. km LambethHerne Hill 2sq. km LambethKnight's Hill 1.5sq. km LambethLarkhall 1.1sq. km LambethOval 1.3sq. km LambethPrince's 1.2sq. km LambethSt. Leonard's 1.4sq. km LambethStockwell 0.9sq. km LambethStreatham Hill 1.3sq. km LambethStreatham South 1.7sq. km LambethStreatham Wells 1.4sq. km LambethThornton 1.1sq. km LambethThurlow Park 1.5sq. km LambethTulse Hill 1sq. km LambethVassall 1.1sq. km LambethBellingham 3.1sq. km LewishamBlackheath 2.3sq. km LewishamBrockley 1.7sq. km LewishamCatford South 1.9sq. km LewishamCrofton Park 1.7sq. km LewishamDownham 2.4sq. km LewishamEvelyn 1.8sq. km LewishamForest Hill 1.8sq. km LewishamGrove Park 2.4sq. km LewishamLadywell 1.6sq. km LewishamLee Green 1.8sq. km LewishamLewisham Central 2.1sq. km LewishamNew Cross 1.8sq. km LewishamPerry Vale 1.7sq. km LewishamRushey Green 1.8sq. km LewishamSydenham 1.7sq. km LewishamTelegraph Hill 1.5sq. km LewishamWhitefoot 2.2sq. km LewishamAbbey 1.4sq. km MertonCannon Hill 2.2sq. km MertonColliers Wood 1.1sq. km MertonCricket Green 3sq. km MertonDundonald 1.2sq. km MertonFigge's Marsh 1.1sq. km MertonGraveney 0.9sq. km MertonHillside 1.2sq. km MertonLavender Fields 1.2sq. km MertonLongthornton 1.5sq. km MertonLower Morden 1.8sq. km MertonMerton Park 1.8sq. km MertonPollards Hill 2.2sq. km MertonRavensbury 1.8sq. km MertonRaynes Park 1.9sq. km MertonSt. Helier 1.8sq. km MertonTrinity 1.1sq. km MertonVillage 6.2sq. km MertonWest Barnes 2sq. km MertonWimbledon Park 2.3sq. km MertonBeckton 6.3sq. km NewhamBoleyn 0.9sq. km NewhamCanning Town North 2.5sq. km NewhamCanning Town South 1.8sq. km NewhamCustom House 2.1sq. km NewhamEast Ham Central 1sq. km NewhamEast Ham North 0.9sq. km NewhamEast Ham South 1.8sq. km NewhamForest Gate North 1.2sq. km NewhamForest Gate South 1.2sq. km NewhamGreen Street East 0.7sq. km NewhamGreen Street West 0.8sq. km NewhamLittle Ilford 1.9sq. km NewhamManor Park 1.3sq. km NewhamPlaistow North 1sq. km NewhamPlaistow South 1.4sq. km NewhamRoyal Docks 4.7sq. km NewhamStratford and New Town 4.2sq. km NewhamWall End 1.4sq. km NewhamWest Ham 1.3sq. km NewhamAldborough 8.6sq. km RedbridgeBarkingside 1.5sq. km RedbridgeBridge 2.6sq. km RedbridgeChadwell 1.5sq. km RedbridgeChurch End 1.5sq. km RedbridgeClayhall 2.5sq. km RedbridgeClementswood 1.3sq. km RedbridgeCranbrook 2.4sq. km RedbridgeFairlop 3.6sq. km RedbridgeFullwell 2.2sq. km RedbridgeGoodmayes 1.6sq. km RedbridgeHainault 5.7sq. km RedbridgeLoxford 1.3sq. km RedbridgeMayfield 1.9sq. km RedbridgeMonkhams 3.1sq. km RedbridgeNewbury 2.1sq. km RedbridgeRoding 2.4sq. km RedbridgeSeven Kings 2.1sq. km RedbridgeSnaresbrook 2sq. km RedbridgeValentines 1.5sq. km RedbridgeWanstead 5.2sq. km RedbridgeBarnes 3sq. km Richmond upon ThamesEast Sheen 5.8sq. km Richmond upon ThamesFulwell and Hampton Hill 1.9sq. km Richmond upon ThamesHam, Petersham & Richmond Riverside 9.4sq. km Richmond upon ThamesHampton 6.9sq. km Richmond upon ThamesHampton North 1.9sq. km Richmond upon ThamesHampton Wick 2.7sq. km Richmond upon ThamesHeathfield 1.9sq. km Richmond upon ThamesKew 3.6sq. km Richmond upon ThamesMortlake and Barnes Common 1.9sq. km Richmond upon ThamesNorth Richmond 2.8sq. km Richmond upon ThamesSt. Margarets & North Twickenham 2sq. km Richmond upon ThamesSouth Richmond 2.7sq. km Richmond upon ThamesSouth Twickenham 1.7sq. km Richmond upon ThamesTeddington 4.3sq. km Richmond upon ThamesTwickenham Riverside 2sq. km Richmond upon ThamesWest Twickenham 2.5sq. km Richmond upon ThamesWhitton 1.6sq. km Richmond upon ThamesBrunswick Park 0.9sq. km SouthwarkCamberwell Green 1sq. km SouthwarkCathedrals 1.8sq. km SouthwarkChaucer 0.8sq. km SouthwarkCollege 3.2sq. km SouthwarkEast Dulwich 1sq. km SouthwarkEast Walworth 1.1sq. km SouthwarkFaraday 0.9sq. km SouthwarkGrange 1.2sq. km SouthwarkLivesey 1.4sq. km SouthwarkNewington 0.8sq. km SouthwarkNunhead 1.3sq. km SouthwarkPeckham 0.9sq. km SouthwarkPeckham Rye 2.3sq. km SouthwarkRiverside 1.3sq. km SouthwarkRotherhithe 1.5sq. km SouthwarkSouth Bermondsey 1sq. km SouthwarkSouth Camberwell 1.3sq. km SouthwarkSurrey Docks 1.9sq. km SouthwarkThe Lane 1.4sq. km SouthwarkVillage 2.8sq. km SouthwarkBeddington North 5sq. km SuttonBeddington South 3.1sq. km SuttonBelmont 2.3sq. km SuttonCarshalton Central 2sq. km SuttonCarshalton South and Clockhouse 7.1sq. km SuttonCheam 3.9sq. km SuttonNonsuch 1.9sq. km SuttonSt. Helier 1.5sq. km SuttonStonecot 2sq. km SuttonSutton Central 1.3sq. km SuttonSutton North 1.9sq. km SuttonSutton South 1.3sq. km SuttonSutton West 1.8sq. km SuttonThe Wrythe 1.5sq. km SuttonWallington North 1.6sq. km SuttonWallington South 1.7sq. km SuttonWandle Valley 2.1sq. km SuttonWorcester Park 2sq. km SuttonCann Hall 0.9sq. km Waltham ForestCathall 1.1sq. km Waltham ForestChapel End 1.9sq. km Waltham ForestChingford Green 3.7sq. km Waltham ForestEndlebury 1.9sq. km Waltham ForestForest 2sq. km Waltham ForestGrove Green 0.9sq. km Waltham ForestHale End and Highams Park 2.3sq. km Waltham ForestHatch Lane 2.4sq. km Waltham ForestHigh Street 3.1sq. km Waltham ForestHigham Hill 3.2sq. km Waltham ForestHoe Street 1.1sq. km Waltham ForestLarkswood 2.1sq. km Waltham ForestLea Bridge 2.6sq. km Waltham ForestLeyton 2sq. km Waltham ForestLeytonstone 1.3sq. km Waltham ForestMarkhouse 1.5sq. km Waltham ForestValley 2sq. km Waltham ForestWilliam Morris 1sq. km Waltham ForestWood Street 1.9sq. km Waltham ForestBalham 1.2sq. km WandsworthBedford 1.8sq. km WandsworthEarlsfield 1.4sq. km WandsworthEast Putney 1.6sq. km WandsworthFairfield 1.5sq. km WandsworthFurzedown 1.4sq. km WandsworthGraveney 1sq. km WandsworthLatchmere 1.1sq. km WandsworthNightingale 1.2sq. km WandsworthNorthcote 1.7sq. km WandsworthQueenstown 3.2sq. km WandsworthRoehampton 4.4sq. km WandsworthSt. Mary's Park 1.4sq. km WandsworthShaftesbury 0.9sq. km WandsworthSouthfields 1.5sq. km WandsworthThamesfield 1.9sq. km WandsworthTooting 1.6sq. km WandsworthWandsworth Common 2.8sq. km WandsworthWest Hill 1.7sq. km WandsworthWest Putney 1.8sq. km WandsworthAbbey Road 1.1sq. km WestminsterBayswater 0.5sq. km WestminsterBryanston and Dorset Square 0.7sq. km WestminsterChurchill 0.6sq. km WestminsterChurch Street 0.4sq. km WestminsterHarrow Road 0.5sq. km WestminsterHyde Park 1sq. km WestminsterKnightsbridge and Belgravia 3.6sq. km WestminsterLancaster Gate 0.6sq. km WestminsterLittle Venice 0.6sq. km WestminsterMaida Vale 0.6sq. km WestminsterMarylebone High Street 1sq. km WestminsterQueen's Park 0.6sq. km WestminsterRegent's Park 2.3sq. km WestminsterSt. James's 3.5sq. km WestminsterTachbrook 0.4sq. km WestminsterVincent Square 0.7sq. km WestminsterWarwick 0.6sq. km WestminsterWestbourne 0.7sq. km WestminsterWest End 2sq. km WestminsterBethnal Green 1.2sq. km Tower HamletsBlackwall and Cubitt Town 1.9sq. km Tower HamletsBow East 1.9sq. km Tower HamletsBow West 1.3sq. km Tower HamletsBromley North 0.6sq. km Tower HamletsBromley South 0.7sq. km Tower HamletsCanary Wharf 1.6sq. km Tower HamletsIsland Gardens 1.5sq. km Tower HamletsLansbury 1.3sq. km Tower HamletsLimehouse 0.5sq. km Tower HamletsMile End 1.2sq. km Tower HamletsPoplar 0.7sq. km Tower HamletsSt Dunstan's 0.7sq. km Tower HamletsSt Katharine's and Wapping 1.5sq. km Tower HamletsSt Peter's 1.1sq. km Tower HamletsShadwell 0.6sq. km Tower HamletsSpitalfields and Banglatown 0.9sq. km Tower HamletsStepney Green 0.6sq. km Tower HamletsWeavers 0.7sq. km Tower HamletsWhitechapel 1sq. km Tower HamletsBrownswood 0.5sq. km HackneyCazenove 0.7sq. km HackneyClissold 1sq. km HackneyDalston 0.5sq. km HackneyDe Beauvoir 0.6sq. km HackneyHackney Central 0.8sq. km HackneyHackney Downs 1sq. km HackneyHackney Wick 1.6sq. km HackneyHaggerston 0.9sq. km HackneyHomerton 0.8sq. km HackneyHoxton East and Shoreditch 1sq. km HackneyHoxton West 0.6sq. km HackneyKing's Park 1.9sq. km HackneyLea Bridge 1.1sq. km HackneyLondon Fields 1sq. km HackneyShacklewell 0.4sq. km HackneySpringfield 1.2sq. km HackneyStamford Hill West 0.7sq. km HackneyStoke Newington 1sq. km HackneyVictoria 0.8sq. km HackneyWoodberry Down 0.9sq. km HackneyAbingdon 0.6sq. km Kensington and ChelseaBrompton and Hans Town 1.1sq. km Kensington and ChelseaCampden 1sq. km Kensington and ChelseaChelsea Riverside 0.7sq. km Kensington and ChelseaColville 0.5sq. km Kensington and ChelseaCourtfield 0.6sq. km Kensington and ChelseaDalgarno 0.9sq. km Kensington and ChelseaEarl's Court 0.5sq. km Kensington and ChelseaGolborne 0.6sq. km Kensington and ChelseaHolland 1sq. km Kensington and ChelseaNorland 0.5sq. km Kensington and ChelseaNotting Dale 0.6sq. km Kensington and ChelseaPembridge 0.4sq. km Kensington and ChelseaQueen's Gate 0.6sq. km Kensington and ChelseaRedcliffe 0.7sq. km Kensington and ChelseaRoyal Hospital 1sq. km Kensington and ChelseaSt Helen's 0.5sq. km Kensington and ChelseaStanley 0.7sq. km Kensington and ChelseaCity of London 3.1sq. km City of London 0.4sq. km 29sq. km

What you’re looking at

London is broken down into 35 boroughs, 630 electoral wards, or 3000ish postcodes. I chose to visualise wards because although there is a huge amount of per-borough data kicking around, having only 35 bubbles doesn’t provide quite the effect I was looking for, and conversely, although having each postcode would be very beautiful and granular, it would be very slow to render for all but the most grunty CPUs. Per-ward data seems to strike a good balance of granularity, data availability, and performance.

Each ward tries to stay close to its geographical location, but can get pushed away as the wards around it grow or shrink - the idea is to give a broad sense of geography, so I think it’s ok that they can get slightly mixed up.

Limitations and choices

Working with the data at hand meant being aware of certain limitations of the data set and my ability to present it. For instance, the first version of this used a data set from 2012, which I subsequently was unable to reconcile with the 2016 Mayoral Election results because of the adjustment of certain wards in 2014. This meant becoming aware of exactly which year and which ward boundaries each dataset I looked at corresponded to. It also means that in this visualisation, the data for pre-2014 has been massaged into a post-2014 shape (this was handled at the source by GLA, not by me, thankfully!).

The locations were generated by taking the entire ONS London Postcode database, grouping by ward, and averaging the postcodes. This is OK for a relatively coarse application like this, but for more precise work a more carefully considered dataset would probably make sense.

I’m also aware that every act of communication exposes the author’s biases and conceptions, whether intentionally or not: for instance, when exposing a set of data as sizes, I have to decide both the minimum and maximum sizes, as well as the scaling function. Data can look much more dramatic with one set of choices than with another:

Prices, scaled linearly Prices, scaled by square root

Similarly, choosing which colours to use to present data about ethnic minority population or socially rented housing could appear to make value judgements about the data presented - for instance, does red signify high or low or good or bad?

Technology

To draw this data, I used d3.js force layout with the wards as nodes. Each ward has three competing forces acting on it: the first is a spring-like force pulling it towards its geographical location, and the second is a very strong short-range force attempting to prevent it overlapping its neighbours, and the third is a charge force which distributes the wards slightly more evenly across space. Choosing this set of forces allows a sense of which part of London is which, whilst allowing different areas to grow and shrink in an organic way. It does mean that wards can get a little mixed up, so the idea is only to give a broad sense of geography.

The data is served as a single SQLite file which is interrogated using SQL.js. This allows a lot of flexibility in loading in data - the ability to do joins and aggregations on-the-fly saves a lot of code and memory, and it means that whilst developing I was able to load in table as and when I wanted to try a new data shape.