Thanks for the clarification and information both. I'll just make do I
guess; most users aren't going to be paying that much attention, lets be
honest. :-)

Cheers,
Jonathan



On 29 June 2013 11:30, Edward Mac Gillavry <[email protected]> wrote:

> Hi Jonathan,
>
> Although not  a desirable effect, this is the expected behaviour. We're
> experiencing the exact same behaviour in one of our maps. The vendorOption
> "group" actually groups the geometries based on the label attribute only,
> but does not take into account the other attributes that relate to the
> geometries and that are used for the visualisation.
>
> For another project we pre-processed the Tele Atlas data first, grouping
> the geometries not only by name, but also other attributes (e.g. "Form of
> Way", "Network Class", "Direction of Traffic Flow"). In order not to have
> one geometry containing all the "High Streets" in a country, we then
> performed an ST_Dump. In short: pre-process the data and don't rely on the
> vendorOption "group" for this kind of visualisation.
>
> Another approach could be to refactor to the code in GeoServer so the
> vendorOption "group" actually takes into account the other attrributes that
> are declared in the <ogc:filter> tags of the <Rule>.
>
> All the best,
>
> Edward
>
> ------------------------------
> From: [email protected]
> Date: Fri, 28 Jun 2013 11:53:20 +0100
> To: [email protected]
> Subject: [Geoserver-users] Labelling - layer group
>
>
> Hi List,
> I'm getting some anomalous behaviour and figured I'd ask if it was
> as-designed or if it seems like a bug.
>
> I have two layers coming from two different tables. One contains Primary
> Roads (green), the other A-Roads (red).
> Each has a single SLD which draws the features and labels them. The only
> different between the two SLD's is the colours.
>
> I'm using the grouping feature:
> <VendorOption name="group">yes</VendorOption>
>
> Any given road section is only geographically represented once between
> these two layers - there is no overlapping. But from a labelling
> perspective a road's name can appear in both layers.
>
> So the A444 could be a mixture of primary road and A-Road as thus:
>
> -------====-------
>
> My issue is that the grouping seems to happen across layers. So I have a
> Primary road (A444) being labelled with the colour scheme of the A-road
> because there are three sections of A444 in the A-road layer (there are 63
> in the Primary Road layer).
>
> [image: Inline images 1]
> The A-Road A444 sections are all 60 pixels north under "Nuneaton". The
> label should be Primary Road green.
>
> Should this happen? I expected the grouping to only happen within a single
> layer, not across layers. There's no mention of which way it's supposed to
> work in the help.
>
> Jonathan
>
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