On 20/05/2010, at 6:42 PM, Andrea Aime wrote:
>> So at the end of the day we want the rescaling visitor to do
>> everything it can prior to letting the renderer at it. Question. Can
>> the rescale visitor inject a function expression around entries in
>> order to accomplish a conversion?
> 
> Why a function expression?

Or at least injecting an expression ,,,
Just going over options; if I see a concat( expr, "m" ) I would find it easer 
to replace that with the correct  expr * M_SCALE_RATIO

> I'm usually a bit weary of using functions as they don't translate down to 
> sql, but for symbolizers that should not be a problem

Understood.

Jody
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