I have a site that uses markers on the URLs religiously to track traffic across the site to determine the source to each piece of content, ?src=xxxx is appended to the end of all URLs. This is obviously negatively impacting our optimization through the site as the spiders see xxx.htm?src=abc and xxx.htm?src=123 as 2 entirely different pages.

What would be the suggested method for cleaning this up? Keep in mind that we have over 2 million pages indexed by Google and there are over 1k different markers.

I have considered rewriting the resulting URLs and have considered 301 redirects as well but this seems like it would be overly complex, any suggestions?

Aren't you getting hit with a lot of Supplemental pages doing that? All those different URLs with the same content are duplicates.

There has to be a better way to track visitor movement on the site.

Yes we are and I want to clean a lot of that up.

Gettting our internal team to get rid of the markers would be like pulling teeth. Are there any other solutions?