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Hi Jérome: Exellent news! What you outline would be a most welcome set of improvements. I have a feeling that most of the folks that initially build SLD support in MapServer aren’t very active anymore so we may be on our own. I’ll do what I can to help though
and will take some time to familiarize myself with the SLD code a bit more. <br>
<br>
It would be great to see you in Mpls this spring!<br>
<br>
—Steve<br>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> mapserver-dev <mapserver-dev-bounces@lists.osgeo.org> on behalf of jbo-ads <jbo-ads@laposte.net><br>
<b>Sent:</b> Thursday, February 21, 2019 10:36:02 AM<br>
<b>To:</b> mapserver-dev@lists.osgeo.org<br>
<b>Subject:</b> [mapserver-dev] MapServer SLD support</font>
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<div class="PlainText">Hi,<br>
<br>
I’m starting to work on improving SLD support in MapServer. So far,<br>
we’ve identified seven issues that should be fixed for the benefit of our<br>
internal projects and hopefully of the whole community of MapServer<br>
users. These issues are:<br>
<br>
1. GetStyles: WMS “GetStyles” request returns a SLD file based<br>
only on MapFile configuration even if a SLD or SLD_BODY<br>
parameter is present in the request.<br>
<br>
2. UserLayer: MapServer implementation of SLD doesn’t handle<br>
<UserLayer> element.<br>
<br>
3. Add, Sub, Mul, Div: MapServer implementation of SLD doesn’t<br>
handle arithmetic operations in <SvgParameter> or other elements<br>
expected to hold arithmetic expressions.<br>
<br>
4. Style overriding: When several styling rules apply to a<br>
feature, only the first one is taken into account, instead of<br>
appliyng them all by following the “painters model” as described<br>
in Symbology Encoding specification.<br>
<br>
5. LineSymbolizer: Mark, ExternalGraphic: MapServer<br>
implementation of SLD doesn’t handle <Mark> or <ExternalGraphic><br>
elements in a <LineSymbolizer> element.<br>
<br>
6. LineSymbolizer + PolygonSymbolizer: MapServer implementation<br>
of SLD doesn’t handle both <LineSymbolizer> and<br>
<PolygonSymbolizer> in the same <Rule> element (which is more<br>
expressive than both <Fill> and <Stroke> in the same<br>
<PolygonSymbolizer>).<br>
<br>
7. Literal, PropertyName: MapServer implementation of SLD<br>
doesn’t handle <Literal> or <PropertyName> elements in<br>
<SvgParameter> or other elements expected to hold arithmetic<br>
expressions.<br>
<br>
Currently I’m working on issues #7 and #3. I plan to open issues and write RFC.<br>
Any comments, discussions or advices from former developers of SLD in MapServer, or from other<br>
MapServer experts, are warmly welcome.<br>
<br>
Moreover, I am studying the possibility of attending the upcoming OSGeo<br>
Community Sprint 2019 to be held in Minneapolis in May.<br>
<br>
Regards,<br>
Jérome.<br>
<br>
<br>
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