[Mapserver-users] Turning on/off parts of layer based on expr ession

[Martin, Daniel]

Perhaps not what you want, but you can make multiple layers out of the same
shape file based on filters.  You don't need to create 250 different shape
files, just 250 layers all with different filters pointing to the same shape
file.  I do it that way with a check box legend and TIGER data.

But, perhaps I'm missing something?

-Dan Martin

> -----Original Message-----
> From: Steve McCrone (maps@work) [mailto:mccrone@pc.jaring.my]
> Sent: Thursday, February 20, 2003 7:46 AM
> To: mapserver-users@lists.gis.umn.edu
> Subject: [Mapserver-users] Turning on/off parts of layer based on
> expression
> 
> 
> Currently I am turning on/off the layers using check boxes, 
> and I am using
> pure cgi mapserver and the rosa applet.
> Fine, works well. Now, is it possible to turn on/off parst of 
> the layer
> (based on expression value) interactively (like check boxes). 
> The reason
> being is that I have one table with say 200 different 
> clasifications and I
> want the user to turn on/off a selected classification. I 
> really do not wish
> to break up the shape file into 250 different files.
> 
> Thanks
> 
> 
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