[mapserver-users] Rendering order of objects in a layer

[Dan Little]

If you're already pulling from a view, you might want to consider three views:
interstates
highways
local roads

(or how ever you layer it)

Then create three separate layers for each one of the views.


----- Original Message ----
> From: David Nugent <davidn at datalinktech.com.au>
> To: mapserver-users at lists.osgeo.org
> Sent: Wednesday, June 10, 2009 8:41:48 AM
> Subject: [mapserver-users] Rendering order of objects in a layer
> 
> Hello all,
> 
> Is there any way in which the rendering order of objects in a layer can be 
> determined by mapserver?
> 
> For example, I want to ensure that major roads (highways, arterials) are 
> rendered after local/minor/unimproved roads when all are rendered as a single 
> layer; which tends to make joins between them look much nicer if the major roads 
> are rendered first.
> 
> This is for vector data coming from postgis, which ultimately results in 
> executing the query on a view. I hesitate to fiddle with forcing index use here 
> as I would think the gist queries on the geometry field would come into play.  
> However, the results in the query seem to drop by chance regardless if the order 
> of CLASS sections in the mapfile (which is what I would expect).
> 
> Regards,
> David
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