[OpenLayers-Dev] WFS layer and filter - more

swey...@telefonica.net Fri, 17 Dec 2010 05:47:11 -0800

I have asked this before but probably should have provided more information. 
Please find below the data returned by the service.
I need to get hold on ‘geometria’, ‘nombre’ and ‘provincia’. So far, either 
with or without prefix, in lower case or camelcase I always get back a ‘ 
property name xxx could not be resolved’.


Hi list,
I have a particular WFS layer here which is giving me trouble and I need some 
help on identifying the correct geometryName and the filter property.

It’s gazetteer service and I want to apply comparison filters eventually. 

var myFilter = new OpenLayers.Filter.Comparison({
         type: "~",
         property: "nombreEntidad", //no
         value: "Madrid" 
});


So far I’ve managed to display points on my map using Strategy.Fixed without 
any filter:  

var myLayer = new OpenLayers.Layer.Vector( "my title",   {              
   strategies: [new OpenLayers.Strategy.Fixed()],
   protocol: new OpenLayers.Protocol.WFS({
      url: "http://www.idee.es/IDEE-WFS-Nomenclator-NGC/services?";,
      featureType: 'Entidad', 
      featurePrefix: 'mne',
      featureNS :  "http://www.idee.es/mne";,
      readFormat: new OpenLayers.Format.GML(),
      srsName: "EPSG:4230",
      version: '1.1.0',    
      maxFeatures: 10,
      extractAttributes: true
   }),
   projection: new OpenLayers.Projection("EPSG:4230"),
   // filter: myFilter;
});

I tried setting the filter property to "nombre" or "nombreEntidad" – with and 
without prefix, but no luck. ("PropertyName " nombreEntidad" cannot be 
resolved”).
For applying any spatial filters or just the BBOX strategy I’d have to indicate 
additionally the geometryName which I haven’t figured out either.

Besides, I can select features but the attribute values are null 
(feature.attributes have the expected keys but their values are null). 

Does anybody have a clue? I could post some XML if it’s of help.

I’d also like to know if there is any difference in terms of performance 
between 
1) filterStrategy, 2) filter, and 3) style with a rule and a filter. I guess 
the third option is slowest but what about the other 2 options?

Best regards

Any advice would be highly appreciated. Here comes the string of one point:

<wfs:FeatureCollection numberOfFeatures='1' 
xmlns:gml="http://www.opengis.net/gml"; xmlns:wfs="http://www.opengis.net/wfs"; 
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"; 
xmlns:mne="http://www.idee.es/mne"; xmlns:xlink="http://www.w3.org/1999/xlink"; 
xsi:schemaLocation="http://www.idee.es/mne 
http://www.idee.es:80/IDEE-WFS-Nomenclator-NGC/services?SERVICE=WFS&amp;amp;VERSION=1.1.0&amp;amp;REQUEST=DescribeFeatureType&amp;amp;TYPENAME=mne:Entidad&amp;amp;NAMESPACE=xmlns(mne=http://www.idee.es/mne)
 http://www.opengis.net/wfs 
http://schemas.opengis.net/wfs/1.1.0/wfs.xsd";><gml:boundedBy><gml:Envelope 
srsName='EPSG:4230'><gml:pos srsDimension='2'>-4.9 
38.2333333333333</gml:pos><gml:pos srsDimension='2'>-4.9 
38.2333333333333</gml:pos></gml:Envelope></gml:boundedBy><gml:featureMember><mne:Entidad
 gml:id="ES.IGN.NGC_1018"><gml:boundedBy><gml:Envelope 
srsName='EPSG:4230'><gml:pos srsDimension='2'>-4.9 
38.2333333333333</gml:pos><gml:pos srsDimension="2">-4.9 
38.2333333333333</gml:pos></gml:Envelope></gml:boundedBy><mne:nombreEntidad><mne:NombreEntidad
 gml:id="ES.IGN.NGC_1018.GM2TENQ171644"><mne:nombre>Sierra 
Chimorra</mne:nombre><mne:idioma>spa</mne:idioma><mne:claseNombre>preferente</mne:claseNombre><mne:estatus>oficial</mne:estatus><mne:fuente>1:1
 millón: Mapa de la Península Ibérica, Baleares y Canarias, escala 1:1.000.000. 
Instituto Geográfico Nacional, 2000</mne:fuente></mne:NombreEntidad>

</mne:nombreEntidad><mne:tipoEntidad><mne:TipoEntidad 
gml:id="ES.IGN.NGC.TP.J5JE6R2S171644"><mne:tipo>OROGR</mne:tipo><mne:catalogoEntidades>URL:http://www.idee.es/show.do?to=pideep_conciso.ES</mne:catalogoEntidades></mne:TipoEntidad>

</mne:tipoEntidad><mne:tipoEntidad><mne:TipoEntidad 
gml:id="ES.IGN.NGC.TP.KNUWK4TSME171644"><mne:tipo>Sierra</mne:tipo><mne:catalogoEntidades>URL:http://www.idee.es/show.do?to=pideep_conciso.ES</mne:catalogoEntidades></mne:TipoEntidad>

</mne:tipoEntidad><mne:posicionEspacial><mne:PosicionEspacial 
gml:id="ES.IGN.NGC.PS.GEYDKNBUHA171644"><gml:boundedBy><gml:Envelope 
srsName='EPSG:4230'><gml:pos srsDimension='2'>-4.9 
38.2333333333333</gml:pos><gml:pos srsDimension="2">-4.9 
38.2333333333333</gml:pos></gml:Envelope></gml:boundedBy><mne:geometria><gml:Point
 srsName="EPSG:4230">

<gml:pos srsDimension="2">-4.9 38.2333333333333</gml:pos>

</gml:Point></mne:geometria></mne:PosicionEspacial>

</mne:posicionEspacial><mne:entidadLocal><mne:EntidadLocal 
gml:id="ES.IGN.NGC.EL.IPZXEZDPMJQQ171644"><mne:comunidadAutonoma>Andalucía</mne:comunidadAutonoma><mne:provincia>Córdoba</mne:provincia></mne:EntidadLocal>

</mne:entidadLocal><mne:codificacion><mne:Codificacion 
gml:id="ES.IGN.NGC.CO.NGC_1018171644"><mne:codigo>NGC_1018</mne:codigo><mne:sistemaCodificacion>Nomenclátor
 Geográfico Conciso 1.0. Instituto Geográfico 
Nacional</mne:sistemaCodificacion></mne:Codificacion>

</mne:codificacion><mne:mapa><mne:Mapa 
gml:id="ES.IGN.NGC.MA.JVKE4NJQ.GA4DQMA171644"><mne:serie>MTN50</mne:serie><mne:hoja>0880</mne:hoja></mne:Mapa>

</mne:mapa></mne:Entidad>

</gml:featureMember></wfs:FeatureCollection>

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[OpenLayers-Dev] WFS layer and filter - more

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