OAC super-groups
Download our poster of all postcode areas [low res (~12Mb) | high res (~74Mb)]
E-mail us at gicentre 'at' soi.city.ac.uk.
Choose one of the postcode areas listed below for a cartogram.
Aberdeen (AB), St Albans (AL), Birmingham (B), Bath (BA), Blackburn (BB), Bradford (BD), Bournemouth (BH), Bolton (BL), Brighton (BN), Bromley (BR), Bristol (BS), Carlisle (CA), Cambridge (CB), Cardiff (CF), Chester (CH), Chelmsford (CM), Colchester (CO), Croydon (CR), Canterbury (CT), Coventry (CV), Crewe (CW), Dartford (DA), Dundee (DD), Derby (DE), Dumfries (DG), Durham (DH), Darlington (DL), Doncaster (DN), Dorchester (DT), Dudley (DY), London (E), London (EC), Edinburgh (EH), Enfield (EN), Exeter (EX), Falkirk and Stirling (FK), Blackpool (FY), Glasgow (G), Gloucester (GL), Guildford (GU), Harrow (HA), Huddersfield (HD), Harrogate (HG), Hemel Hempstead (HP), Hereford (HR), Outer Hebrides (HS), Hull (HU), Halifax (HX), Ilford (IG), Ipswich (IP), Inverness (IV), Kilmarnock (KA), Kingston upon Thames (KT), Kirkwall (KW), Kirkcaldy (KY), Liverpool (L), Lancaster (LA), Llandrindod Wells (LD), Leicester (LE), Llandudno (LL), Lincoln (LN), Leeds (LS), Luton (LU), Manchester (M), Rochester (ME), Milton Keynes (MK), Motherwell (ML), London (N), Newcastle upon Tyne (NE), Nottingham (NG), Northampton (NN), Newport (NP), Norwich (NR), London (NW), Oldham (OL), Oxford (OX), Paisley (PA), Peterborough (PE), Perth (PH), Plymouth (PL), Portsmouth (PO), Preston (PR), Reading (RG), Redhill (RH), Romford (RM), Sheffield (S), Swansea (SA), London (SE), Stevenage (SG), Stockport (SK), Slough (SL), Sutton (SM), Swindon (SN), Southampton (SO), Salisbury (SP), Sunderland (SR), Southend-on-Sea (SS), Stoke-on-Trent (ST), London (SW), Shrewsbury (SY), Taunton (TA), Galashiels (TD), Telford (TF), Tonbridge (TN), Torquay (TQ), Truro (TR), Cleveland (TS), Twickenham (TW), Southall (UB), London (W), Warrington (WA), London (WC), Watford (WD), Wakefield (WF), Wigan (WN), Worcester (WR), Walsall (WS), Wolverhampton (WV), York (YO), Lerwick (ZE)
OAC Cartogram for London (EC)
This is a hierarchical rectanglar cartogram for the London (EC) postcode area. Each small square represents an Output Area coloured by the OAC super-group most typical of its population and how typical this is.
Each Output Area contains around 300 people (England and Wales) or 125 people (Scotland). Each square is sized by population and arranged geographically (i.e. squares at the top left are in the NW) within the geometrical constraints of tiling irregularly-sized squares. Colour hue (see panel on right) represents the most typical OAC super-group for the area. The lightness represent how typical the area is to its most typical OAC super-group, where dark is more typical. We use rectangular cartograms because they normalise for populations and output area boundaries often detract from the data.
Generally large city centres are dominated by one or two very typical super-groups. Rural areas tend to be not very typical of any. You can explore this for the postcodes listed in the panel on the right.
See our OAC Explorer page for more details and downloads.
A measure of how typical each output area is to each of the OAC super-groups is published and are shown as cartograms below.
More information:
The theory: Wood, J. and Dykes, J. 2008, Spatially ordered treemaps, IEEE Transactions on Visualization and Computer Graphics, 14(6) 1348-1355. [pdf]
The technique: Slingsby, A., Dykes, J. and Wood, J. 2010. Rectangular Hierarchical Cartograms for Socio-Economic Data, Journal of Maps, v2010, 330-345. DOI: 10.4113/jom.2010.1090 [link].
Interactive cartography: Slingsby, A., Dykes, J., Wood, J. and Radburn, R. 2010. OAC Explorer: Interactive exploration and comparison of multivariate socioeconomic population characteristics, proceedings of GIS Research UK (GISRUK 2010), pp167-174 [pdf | more details]
Choosing perceptually-uniform colours: Wood. J., Slingsby. A., Dykes. J. 2010. Layout and Colour Transformations for Visualising OAC Data, proceedings of GIS Research UK (GISRUK 2010), pp455-462. [pdf]
Create your own: TreeMappa.