Re: Geocoding using UK census data

sorry, i couldn't really tell you. I can't remember the route i took.
It was the census 2001 disc,
released about two years ago. Here's an example of the data. I may have
calculated centroids from polys.
You'll notice that 1&2 and 3&4 both carry same lat&long. This
demonstrates its poor quality.

ID Postcode Longitude Latitude
1 EC2Y8NJ -9.35268572374886E-02 51.5196808550604
2 EC2Y8DR -9.35268572374886E-02 51.5196808550604
3 EC1A4HR -9.56913191538483E-02 51.5186050424795
4 EC1A4JJ -9.56913191538483E-02 51.5186050424795