Robert,
Thanks for the idea - I suppose it is a good one, I was just trying to avoid 
any calculations outside of mapserver for this one.  Ultimately, your 
suggestion looks like it may be the only way to go.

Has anyone used these CGI params for zooming?

> Hi Robert
> 
> Why don't you calculate a new mapext dynamically and then substitute that?
> 
> Regards
> 
> Robert Sanson
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