Type 1 Aggregation

• Aggregation of a database of personal data with say 50 variables into a geographical data matrix in which the cases are small areas

• Aggregation reduces the number of cases but often increases the number of variables

• Census Data is a good example

  • in the UK 55million records can be reduced to 150,000 small areas but number of variables increased from 22 to 20,000

Previous slide

Next slide

Back to first slide

View graphic version