Hi Jonathan,
The approach to achieve the effect you are after is to create multiple
<FeatureTypeStyle> elements, each with different <ogc:Filter> properties. This
forces GeoServer to do another pass of the table and select another class of
roads to be rendered. Here's a rough structure:
<FeatureTypeStyle>
<ogc:Filter>
Other roads (casing)
</ogc:Filter>
<FeatureTypeStyle>
<FeatureTypeStyle>
<ogc:Filter>
B-roads (casing)
</ogc:Filter>
</FeatureTypeStyle>
<FeatureTypeStyle>
<ogc:Filter>
A-roads (casing)
</ogc:Filter>
</FeatureTypeStyle>
<FeatureTypeStyle>
<ogc:Filter>
Other roads (fill)
</ogc:Filter>
<FeatureTypeStyle>
<FeatureTypeStyle>
<ogc:Filter>
B-roads (fill)
</ogc:Filter>
</FeatureTypeStyle>
<FeatureTypeStyle>
<ogc:Filter>
A-roads (fill)
</ogc:Filter>
</FeatureTypeStyle>
<FeatureTypeStyle>
<ogc:Filter>
Motorways (casing)
</ogc:Filter>
</FeatureTypeStyle>
<FeatureTypeStyle>
<ogc:Filter>
Motorways (fill)
</ogc:Filter>
</FeatureTypeStyle>
Notice the different approach for the Motorways. This forces the Motorways to
be rendered last, thus on top of all other roads for them to become genuine
freeways (without crossing other roads). If you have some attribute to indicate
a road to be in a tunnel or on a bridge, you can add more <FeatureTypeStyle>
tags with more specific <ogc:Filter>s to the SLD.
HTH
Edward
From: [email protected]
Date: Tue, 2 Jul 2013 12:29:49 +0100
To: [email protected]
Subject: [Geoserver-users] Layer render order within a layer
Hi List,
I have a single dataset of road lines that are of different classifications
and so need to be rendered differently. Because they're all in the same dataset
they're using the same SLD.My problem is, that I want to determine which roads
are on top of which other roads. As you can see in the attached, I want the red
road on top of the white ones.
How do I accomplish this within a single layer/SLD?I've tried changing the
ordering of the items within the SLD but this has no effect.
Or am I going to have to simply use different SLD's?
Thanks,
Jonathan
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