[OpenLayers-Users] Format.geojson.write - missing crs with featurecollection

[Frank Broniewski]

Hi,

I'm using Format.GeoJSON for talking with my server. When creating new 
Features and sending them to my server I saw that OL sends the new 
features as a featurecollection object. But there is no crs attached. 
Looking at the code, the crs is only attached to instances of 
OL.Features.Vector. Featurecollections are typeof array and there's no 
crs attachment done in the code. I prepared a small snipped to fix this:

     write: function(obj, pretty) {
         console.info(obj)
         var geojson = {
             "type": null
         };
         if(obj instanceof Array) {
             geojson.type = "FeatureCollection";
             var numFeatures = obj.length;
             geojson.features = new Array(numFeatures);

++            if(obj[0].layer && obj[0].layer.projection) {
++               geojson.crs = this.createCRSObject(obj[0]);
++            }

             for(var i=0; i<numFeatures; ++i) {
                 var element = obj[i];
                 console.log(element)
                 if(!element instanceof OpenLayers.Feature.Vector) {
                     var msg = "FeatureCollection only supports 
collections " +
                               "of features: " + element;
                     throw msg;
                 }
                 geojson.features[i] = this.extract.feature.apply(
                     this, [element]
                 );
             }
         } else if (obj.CLASS_NAME.indexOf("OpenLayers.Geometry") == 0) {
             geojson = this.extract.geometry.apply(this, [obj]);
         } else if (obj instanceof OpenLayers.Feature.Vector) {
             geojson = this.extract.feature.apply(this, [obj]);
             if(obj.layer && obj.layer.projection) {
                 geojson.crs = this.createCRSObject(obj);
             }
         }
         return OpenLayers.Format.JSON.prototype.write.apply(this,
                                                             [geojson, 
pretty]);
     }

I don't know if it is intentionally left out, but I thougth I let 
someone know ...



Frank
-- 
Frank BRONIEWSKI

METRICO s.à r.l.
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