> Encoded polys may help a little but 3110 polys displayed
> simultaneously is too many.  >

That's what I was afraid of.

> Which web service ?  I am curious how it is done.

Esri's ArcWeb Services. It is a pay as go service, each visit costs a
credit and is deducted from your account. ESRI builds a map image,
stores it for a period of time on their servers, and sends back the
link. It is OK, but I like the google maps look and feel, as well as
their pan and zoom capability.  The client doesn't mind paying, it is
a gov't agency it is a low cost way for them to make maps available to
the public.

I'm not quite sure how the tiling works.  If the user is only
interested in a few counties, is it possible to just display them from
the tile? I thought tiles were an all or nothing proposition.


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