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Open data, free tools



Alex Singleton: University of Liverpool and Daniel Lewis: University College London

Alex Singleton: University of Liverpool and Daniel Lewis: University College London



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  • Mention that OAC is a national Statistic provided by the ONS Mention that postcodes are obtained via NSPD – national statistics postcode directory includes OAC Updated quarterly. Available from the ONS site on request and subject to license.
  • We have created a small, free piece of software that will allow you to encode any postcode referenced data with OAC. Essentially, click to download and then extract. It should then work (on windows)
  • Navigate to where it is you want to save the processed file, record a useful name for the file and click next.
  • Show csv will open the file in notebook, not that handy unless you want to give it a quick check. Instead navigate to the file in windows, right-click and open the file in excel or similar.
  • Valid will return either 0 or 1 depending on whether a successful matching has occurred. The OAC column will either record the OAC class, or denote “NOT FOUND”. NOT FOUND indicates 1 of three things: The postcode is wrong/missing; the postcode isn’t in the NSPD; the postcode doesn’t have an OAC code in the NSPD
  • Using the if() function and nested and() functions
  • 1 = same as we see in the whole population >1 = a greater incidence in the group observed than in the whole population <1 = a lesser incidence in the group than observed in the whole population.
  • The graph shows deviation from the rate/ratio for the whole population. Can be useful for some variables. Such calculations are specific for the data you are using and can help you supplement the knowledge you have of your data witht he characteristics that you get from the OAC data. Link to our grand index.
  • We will release version1 in the days after the event.
  • Super Group Uses the index score as discussed before, but also Byar’s approximation for confidence interval at 95% which I won’t go into.
  • Groups

Open data, free tools Presentation Transcript

  • 1. Open Data, Free Tools Alexander Singleton, University of Liverpool Daniel Lewis, University College London Output Area Classification User Group
  • 2.
    • OAC is a free and open geodemographic/ market segmentation classification
    • This means any insight created with it is sharable across institutions
    • However, it was difficult to attach OAC to data as previously postcodes were not free
    • But now they are... So...
  • 3. OACUG
  • 4. OACUG 1. 2.
  • 5. OACUG
  • 6. OACUG
  • 7. OACUG
  • 8. OACUG
  • 9. OACUG
  • 10. OACUG
  • 11. OACUG
  • 12. OACUG
  • 13. OACUG
  • 14.
    • Let’s learn a bit more using an index score:
    • This is basically the ratio of a event occurring for a group over the event occurring in the population as a whole.
  • 15. OACUG
  • 16.
    • A Grand Index for OAC
    • Using nationally representative data to aid interpretation and insight of the Output Area Classification.
    • Downloadable Excel spreadsheet.
  • 17.
    • Data so far:
      • British Population Survey
      • DVLA
    • More to come
      • 2001 Census variables
      • Education and Health data
      • Expenditure and Food survey
      • Anything else that is OAC coded.
  • 18. OACUG
  • 19. OACUG
  • 20.
    • We hope that these tools are useful for you and encourage you to use OAC.
    • We will keep the OACoder data upto date so that new releases of the NSPD are covered.
    • We will endeavour to add to the Grand Index to give you more and more insight into your citizens.
    • Thank You, Questions?