You have a few options based on what you know about ahead of time:

1) If you know the stacking order ahead of time you can create separate layers 
that force the stacking to happen properly.

2) If you don't know the stacking order ahead of time, you can try using 
patterned fills instead of opaque fills.




________________________________
From: Leonardo Olivieri <leonardo.olivi...@imteam.it>
To: mapserver-users@lists.osgeo.org
Sent: Thu, November 12, 2009 8:32:40 AM
Subject: [mapserver-users] entities one upon the other

Hello,

I have a polygon layer with entities, one located upon the other.

The result that I have is:
The entity located upon, hides the entity underneath.

Is it possible to configure mapfile  in such a way that where the
entities are located ones upon the others,
the colour becomes evidenced and different to the case in which the
entities aren't located ones upon the others?

Thank in advance
Leonardo





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