[OpenLayers-Users] Problem Updating dynamic Geojson layer

[Afroz Kannancheri]

Hi all,

I have a Vector layer over a google base map as 

map 		= new OpenLayers.Map('map',map_options);
var google 	= new OpenLayers.Layer.Google("Google
Physical",google_Poptions);
layer1 		= new OpenLayers.Layer.GML("G1", "D2data.json", {
            format: OpenLayers.Format.GeoJSON, 
            styleMap: build_style(), 
            isBaseLayer: false});
			
map.addLayers([google,layer1]);

I have a function which runs every N seconds to update the Geojson layer by
getting
the new D2data.json geojson file generated in the server.

The update function is as follows
function UpdateLayer()
	{
	
	var protocol = new OpenLayers.Protocol.HTTP({ 
    url: "http://localhost/mystuff/s/D2data.json?sid="+Math.random(), 
    format: new OpenLayers.Format.GeoJSON() 
	}); 

	protocol.read({ 
		callback: function(response) { 
			if(response.success()) { 
				var features = response.features; 
				map.layers[1].destroyFeatures();
				for(k in features)
				{
					map.layers[1].addFeatures([features[k]]);
				}
			} else { 
				console.log("failure"); 
			} 
		} 
	}); 
 }

 In the above function, I destroy the existing features and fetch new
features from the server and add them on the layer.
 The destroyFeatures() is working fine, but the addFeatures doesnt do
anything.
 
 It would be of great help if someone could pointout whats wrong in this.
 
 Thanks  and regards
 Afroz
 
			

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