SLD TextSymbolizer issue
Kralidis,Tom [Burlington]
Tom.Kralidis at EC.GC.CA
Fri Nov 19 14:38:54 EST 2004
Thanks.
..Tom
> -----Original Message-----
> From: UMN MapServer Developers List
> [mailto:MAPSERVER-DEV at LISTS.UMN.EDU] On Behalf Of Yewondwossen Assefa
> Sent: Friday, 19 November, 2004 14:38
> To: MAPSERVER-DEV at LISTS.UMN.EDU
> Subject: Re: [UMN_MAPSERVER-DEV] SLD TextSymbolizer issue
>
>
> I filed a bug on it (Bug 1076) to support both ways. Should
> not be difficult to do but I have set it to be done after the
> 4.4 release.
>
> Later,
>
> Kralidis,Tom [Burlington] wrote:
>
> >>-----Original Message-----
> >>From: Yewondwossen Assefa [mailto:assefa at dmsolutions.ca]
> >>Sent: Friday, 19 November, 2004 14:11
> >>To: Kralidis,Tom [Burlington]
> >>Cc: MAPSERVER-DEV at LISTS.UMN.EDU
> >>Subject: Re: [UMN_MAPSERVER-DEV] SLD TextSymbolizer issue
> >>
> >>
> >>Tom,
> >>
> >> Here is my understanding of the specs concerning the
> >>sld:ParameterValueType" (which is taken form the sld 1.0
> doc section
> >>11.1.3)
> >>
> >>
> >><xs:element name="CssParameter" type="sld:ParameterValueType"/>
> >><xs:complexType name="ParameterValueType" mixed="true"> <xs:choice
> >>minOccurs="0" maxOccurs="unbounded"> <xs:element
> >>ref="ogc:expression"/> </xs:choice> </xs:complexType>
> >>
> >>The parameter values are allowed to be complex expressions
> for maximum
> >>flexibility.
> >>The 'mixed="true"' definition means that regular text may
> be mixed in
> >>with various sub-expressions, implying a text-substitution model for
> >>parameter values. Numeric and character-string data types are not
> >>distinguished, which may cause some complications.
> >>
> >>Here are some usage examples:
> >>
> >><CssParameter name="stroke-width">3</CssParameter>
> >>
> >><CssParameter name="stroke-width"> <ogc:Literal>3</ogc:Literal>
> >></CssParameter>
> >>
> >><CssParameter name="stroke-width">
> >><ogc:Add>
> >><ogc:PropertyName>A</ogc:PropertyName>
> >><ogc:Literal>2</ogc:Literal>
> >></ogc:Add>
> >></CssParameter>
> >>
> >><Label>This is city "<ogc:PropertyName>NAME</ogc:PropertyName>"
> >>of state <ogc:PropertyName>STATE</ogc:PropertyName></Label>
> >>
> >>
> >>I think supporting <Label>label_value</Label> should be valid. I
> >>downladed your sld file and fter adding the schemas at the
> top, It did
> >>valiadte using xml-spy. Does It make sense ?
> >>(Note that I initially was supporting the label inside a
> >>propertyName
> >>and the code is still there but commented out).
> >>
> >
> >
> > I retried this with just:
> >
> > <Label>OBSDATE</Label>
> >
> > ..and it validated.
> >
> > So both constructs are valid; should we support both when ingesting
> > SLD XML, and output one style when producing?
> >
> > ..Tom
> >
> >
> >
> >>Looking into the GetLegndGraphics : I do not really understand when
> >>you say "for any TextSymbolizer types". Normally any sld passed
> >>to the wms
> >>(GetMap or GetLegendGraphic) ends up creating mapserver
> classes (both
> >>request use the same sld parsing function), so If and sld is
> >>applied and
> >>the classes are created for GetMap, there is no reason that these
> >>classes would not be created when doing a GetLegendGraphic. I think
> >>from your SLD, the elements <Name> is missing from the
> >><Rule>, which is
> >>supposed to be used as the class name. Could it be the reason ?
> >>
> >
> >
> > I inserted <Rule><Name> and it worked -- thanks.
> >
> >
> >
> >>Later,
> >>
> >>
> >>
> >>
> >>Kralidis,Tom [Burlington] wrote:
> >>
> >>
> >>>Hi,
> >>>
> >>>We've been doing some testing of MapServer with SLD for labelling
> >>>layers and have seem to run into issues. Orginally, we had issues
> >>>with specifying fonts, however, upon deeper investigation,
> >>
> >>the problem
> >>
> >>>may be elsewhere.
> >>>
> >>>Use case:
> >>>
> >>>Here's a GetMap on a simple layer:
> >>>
> >>>
> >>
> >>http://devgeo.cciw.ca/cgi-bin/mapserv/ecows?SERVICE=WMS&VERS
> ION=1.1.1&
> >>
> >>>RE
> >>>
> >>
> >>QUEST=GetMap&SRS=EPSG%3A4326&BBOX=-102.9742339843798,32.853526
> >>53562978,-
> >>
> >>58.474233982194,60.66602653699591&WIDTH=560&HEIGHT=350&LAYERS=
> >>obs&STYLES
> >>
> >>=&FORMAT=image%2Fpng&BGCOLOR=0xFFFFFF&TRANSPARENT=FALSE&EXCEPT
> >>IONS=appli
> >>
> >>>cation/vnd.ogc.se_xml&
> >>>
> >>>Here's the same GetMap with an SLD:
> >>>
> >>>http://devgeo.cciw.ca/ms_tmp/obs1.sld
> >>>
> >>>..which was copied from the example at:
> >>>
> >>>
> >>
> >>http://www2.dmsolutions.ca/msapps/world_testdata/tests/sld_t
> ests/sld_t
> >>
> >>>ex
> >>>t_annotation.xml
> >>>
> >>>..and tweaked for the layer on my server:
> >>>
> >>>
> >>
> >>http://devgeo.cciw.ca/cgi-bin/mapserv/ecows?SERVICE=WMS&VERS
> ION=1.1.1&
> >>
> >>>RE
> >>>
> >>
> >>QUEST=GetMap&SRS=EPSG%3A4326&BBOX=-102.9742339843798,32.853526
> >>53562978,-
> >>
> >>58.474233982194,60.66602653699591&WIDTH=560&HEIGHT=350&LAYERS=
> >>obs&STYLES
> >>
> >>=&FORMAT=image%2Fpng&BGCOLOR=0xFFFFFF&TRANSPARENT=FALSE&EXCEPT
> >>IONS=appli
> >>
> >>>cation/vnd.ogc.se_xml&SLD=http://devgeo.cciw.ca/ms_tmp/obs1.sld
> >>>
> >>>..which gives us back what we are expecting. However, this
> >>
> >>is not a
> >>
> >>>valid SLD document. When I create a valid SLD document:
> >>>
> >>>http://devgeo.cciw.ca/ms_tmp/obs2.sld
> >>>
> >>>And run the same GetMap with this SLD:
> >>>
> >>>
> >>
> >>http://devgeo.cciw.ca/cgi-bin/mapserv/ecows?SERVICE=WMS&VERS
> ION=1.1.1&
> >>
> >>>RE
> >>>
> >>
> >>QUEST=GetMap&SRS=EPSG%3A4326&BBOX=-102.9742339843798,32.853526
> >>53562978,-
> >>
> >>58.474233982194,60.66602653699591&WIDTH=560&HEIGHT=350&LAYERS=
> >>obs&STYLES
> >>
> >>=&FORMAT=image%2Fpng&BGCOLOR=0xFFFFFF&TRANSPARENT=FALSE&EXCEPT
> >>IONS=appli
> >>
> >>>cation/vnd.ogc.se_xml&SLD=http://devgeo.cciw.ca/ms_tmp/obs2.sld
> >>>
> >>>I get an Exception to the effect of:
> >>>
> >>><?xml version='1.0' encoding="ISO-8859-1" standalone="no"
> >>
> >>?> <!DOCTYPE
> >>
> >>>ServiceExceptionReport SYSTEM
> >>>"http://schemas.opengeospatial.net/wms/1.1.1/exception_1_1_1.dtd">
> >>><ServiceExceptionReport version="1.1.1">
> >>><ServiceException>
> >>>msDrawMap(): Image handling error. Failed to draw layer named
> >>>'obs'.
> >>>msDBFGetItemIndex(): DBASE file error. Item
> >>
> >>'PropertyName' not
> >>
> >>>found. </ServiceException>
> >>></ServiceExceptionReport>
> >>>
> >>>In addition, GetLegendGraphic requests do not work (for any
> >>>TextSymbolizer types, actually).
> >>>
> >>>Looking at the two SLD documents in question, the working
> >>
> >>SLD (which
> >>
> >>>is not valid) looks for the label property as:
> >>>
> >>>
> >>
> >>/StyledLayerDescriptor/NamedLayer/UserStyle/FeatureTypeStyle
> /TextSymbo
> >>
> >>>li
> >>>zer/Label
> >>>
> >>>Whereas the spec defines it like:
> >>>
> >>>
> >>
> >>/StyledLayerDescriptor/NamedLayer/UserStyle/FeatureTypeStyle
> /TextSymbo
> >>
> >>>li
> >>>zer/Label/ogc:PropertyName
> >>>
> >>>Comments?
> >>>
> >>>..Tom
> >>>
> >>>
> >>
> >>
> >>--
> >>----------------------------------------------------------------
> >>Assefa Yewondwossen
> >>Software Analyst
> >>
> >>Email: assefa at dmsolutions.ca
> >>http://www.dmsolutions.ca/
> >>
> >>Phone: (613) 565-5056 (ext 14)
> >>Fax: (613) 565-0925
> >>----------------------------------------------------------------
> >>
> >>
> >>
> >
> >
> >
>
>
> --
> ----------------------------------------------------------------
> Assefa Yewondwossen
> Software Analyst
>
> Email: assefa at dmsolutions.ca
> http://www.dmsolutions.ca/
>
> Phone: (613) 565-5056 (ext 14)
> Fax: (613) 565-0925
> ----------------------------------------------------------------
>
More information about the mapserver-dev
mailing list