Step 3. Classify the census Ed's using a multivariate classifier
Various methods used including
- K means (see SAS or SPSS)
- Neural Nets principally unsupervised neural nets
- Hybrid methods with genetic algorithm used to fine tune the results
Openshaw and Openshaw (1997) Artificial Intelligence for Geographers (Wiley) tells you how to do it
Typical computing cost 20p