[OpenLayers-Users] Auto-refreshing a GeoRSS layer

[Bart van den Eijnden]

I would use a vector layer with a http protocol pointing to the GeoRSS file, and then add a Refresh Strategy.

Something like this (untested, for a refresh every 60 seconds):

                var layer = new OpenLayers.Layer.Vector("mylayer", {
                    strategies: [new OpenLayers.Strategy.Fixed(), new OpenLayers.Strategy.Refresh({interval: 60000})],
                    protocol: new OpenLayers.Protocol.HTTP({
                        url:  "http://myhost/mygeorss",
                        format: new OpenLayers.Format.GeoRSS()
                });

Best regards,
Bart

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Bart van den Eijnden
OSGIS
bartvde at osgis.nl

On Aug 10, 2010, at 7:05 PM, Hubick, William wrote:

> Hi Everyone,
>  
> My project is considering GeoRSS as our data-sharing standard with partners. I am pleased with how easily OpenLayers will display GeoRSS points, but I'm wondering how other developers ensure efficient auto-updates. My first impression was that OpenLayers would automatically check a GeoRSS XML file and automatically load updates (i.e., like an RSS aggregator). When further exploring, it seems like custom code must be written to auto-update the layer.
>  
> Am I missing something? Is there a way to ensure new points added to a GeoRSS file are automatically, efficiently loaded by OpenLayers (without page refresh)? It seems like there must be a better way to update the layer than destroying and reloading the GeoRSS layer.
>  
> Any help would be greatly appreciated!
>  
> Thanks in advance,
>  
> Bill
>  
> Bill Hubick
> Cobham Analytic Solutions
> william.hubick at cobham.com
>  
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