On Mar 7, 2011, at 7:39 PM, Eric Lemoine wrote: > On Monday, March 7, 2011, Leigh Holcombe <[email protected]> wrote: >> Greetings, >> >> I have a layer constructed from a GeoJSON file, using the following code: >> var trail1 = new OpenLayers.Layer.Vector("Kaau Crater", {strategies: [new >> OpenLayers.Strategy.Fixed()], protocol: new OpenLayers.Protocol.HTTP({url: >> "kaaucrater-rb.json", format: new OpenLayers.Format.GeoJSON()}), styleMap: >> styles, projection: utm4n}); >> >> What I'd like to do is get the bounds or centerpoint of the GeoJSON file >> automatically, perhaps by using something like getBounds or getCenterLonLat, >> but my newb mind is discovering that I can't perform these operations on the >> layer object I have created. I suspect I need to also create a geometry >> layer from the GeoJSON file, but I am not sure how to do that. Can anyone >> provide any direction? > > Hi. The Vector layer has a getDataExtent method, that you can call > when the features have been added to the layer: > > trail1.events.on({"loadend": function() { > var bounds = trail1.getDataExtent(); > }}); > > -- > Eric Lemoine >
Thank you, that works very well. However, it's a little too late in the process. My plan is to use the bounds/extent to calculate the center of the overlay, and then pass that to map.setCenter. Is there a way to make this happen before the loadend? Additionally, where can I find a complete list of the standard events, such as loadstart and loadend? _______________________________________________ Users mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/openlayers-users
