[OpenLayers-Users] Problems to obtain feature value

[fsalas]

Christopher, I change to
INFO_FORMAT: 'application/vnd.ogc.gml' , now work ok, but I consider that
the request is slow
exist other solution more fast ?

regards, salas






----- Original Message ----- 
From: "Christopher Schmidt" <crschmidt at metacarta.com>
To: "fsalas" <fsalas at geocuba.cu>
Cc: <users at openlayers.org>
Sent: Wednesday, September 23, 2009 11:15 AM
Subject: Re: [OpenLayers-Users] Problems to obtain feature value


> On Wed, Sep 23, 2009 at 12:04:38PM -0500, fsalas wrote:
>> Hi, all
>>
>> I have following problem:
>>
>> I am trying to obtain the value of a field, but is null
>>
>> is The variable features.length is zero, how can I resolv this problem?
>
> My guess is that your'e not returning GML from your GetFeatureInfo.
> Did you check what youer' returning via console.log or some such?
>
> -- Chris
>
>>
>> function setHTML(response) {
>>         var format = new OpenLayers.Format.GML();
>>         var features = format.read(response.responseXML ||
>> response.responseText);
>>          for (var i=0, len=features.length; i<len; i++) {
>>                 var feature = features[i];
>>                 for (attribute in feature.attributes) {
>>                     var value = feature.attributes[attribute];
>>                     console.log(attribute + ": " + value);
>>                 }
>>           }
>> }
>>
>>
>>    tiled = new OpenLayers.Layer.WMS(
>>                 "topp:cuba - Tiled", "http://deltha:8080/geoserver/wms",
>>                 {
>>                     width: '800',
>>                     srs: 'EPSG:4267',
>>                     layers: 'topp:cuba',
>>                     height: '300',
>>                     styles: '',
>>                     format: 'image/png',
>>                     tiled: 'true',
>>                     tilesOrigin : "-86.09241054242432,19.388371083287836"
>>                 },
>>                 {buffer: 0}
>>             );
>>
>>
>>       // support GetFeatureInfo
>>             map.events.register('click', map, function (e) {
>>                 document.getElementById('nodelist').innerHTML =
>> "Loading... please wait...";
>>                 var url =  map.layers[0].getFullRequestString(
>>                     {
>>                         REQUEST: "GetFeatureInfo",
>>                         EXCEPTIONS: "application/vnd.ogc.se_xml",
>>                         BBOX: map.getExtent().toBBOX(),
>>                         X: e.xy.x,
>>                         Y: e.xy.y,
>>                         INFO_FORMAT: 'application/vnd.ogc.se_xml',
>>                         QUERY_LAYERS: map.layers[0].params.LAYERS,
>>                         FEATURE_COUNT: 50,
>>                         WIDTH: map.size.w,
>>                         HEIGHT: map.size.h
>>                     },
>>                     "http://deltha:8080/geoserver/wms"
>>                 );
>>                 OpenLayers.loadURL(url, '', this, setHTML, setHTML);
>>                 OpenLayers.Event.stop(e);
>>             });
>>
>> ___________________________________
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>> Grupo Empresarial GEOCUBA
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>> Revisado por Kaspersky Antivirus
>> ----------------------------------------------------------------------
>> Definition count:  2618974
>> Definition date:  9/23/2009
>> SecurityPlus version: 3.0.5
>>
>
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>
>
> -- 
> Christopher Schmidt
> MetaCarta
>


___________________________________
Dirección de Comunicaciones
Grupo Empresarial GEOCUBA
Este mensaje esta libre de virus. 
Revisado por Kaspersky Antivirus
----------------------------------------------------------------------
Definition count:  2618974
Definition date:  9/23/2009
SecurityPlus version: 3.0.5