clickthinker - 10:45 am on Nov 16, 2002 (gmt 0)

Marcia - I've been taking a look to see what percentage of the site was made up of duplicate pages, and its probably more that I initially thought...
You asked when Page A is considered a duplicate of Page B, this is how we worked it:
We had different types of tour for people to choose from, eg:

Popular tours
Adventure tours
Camping tours

Our navigation was as follows - We have a site wide header include with links to the index pages of the top level pages, eg, Tours, Accommodation, Contact Us.
And a left hand site wide include going to each of the country pages and the index page of each type of tour offered.
Our problem of duplicate content came in when you get to:
If a tour went through SA, Namibia and Botswana you could get the same content by going:

domain.com/southafrica/Popular/tour1
domain.com/namibia/Popular/tour1
domain.com/botswana/Popular/tour1

and the same for:
domain.com/namibia/camping/tour1
domain.com/southafrica/camping/tour1

As these pages were all built out of a db - they were all exactly the same, the only change was the URL.

What we've done now is have a tour directory and no matter where a person come from within the site, they get the same page:
domain.com/tours/tour1

martinibuster - thanks for the tip of a site map!