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I have a lot of OpenLayers layers that change every day so instead of having to create, and change a long list of these:

var layerone = new OpenLayers.Layer.XYZ("mylayer1", "mylayer1/${z}/${x}/${y}.png", { });

var layercool = new OpenLayers.Layer.XYZ("mylayer1", "mylayer1/${z}/${x}/${y}.png", { });

etc

I'd like to first make an array of layer names:

var mylayers = new Array("layerone","layercool","layeryo","layerhello");

and then create all these layers in a for loop, something like this:

var length = mylayers.length;
for (var i = 0; i < length; i++) {

mylayers[i] = new OpenLayers.Layer.XYZ("mylayers[i]", "mylayers[i]/${z}/${x}/${y}.png", { }); 

}

How do I first of all create unique var names for each layer in the foor loop and then do the loop? I read somewhere to use window[layers[i]] = new OpenLayers.Layer... or maybe eval? but I'm not sure how to access these later on when doing the map.addLayers();

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1 Answer 1

up vote 2 down vote accepted

you can get your added layers by map.getLayersByName('layerone'). and you can give layerId to your layer so you can get them all.

for (var i = 0; i < length; i++) {
mylayers[i] = new OpenLayers.Layer.XYZ(mylayers[i], mylayers[i] + "/${z}/${x}/${y}.png", {
              layerId : i
 }); 

map.addLayer(mylayers[i]);

};

i hope it helps you...

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Yes! Works like a charm. I was close with my own code but not all the way. Thanks! –  Oskar Karlin Jan 15 '13 at 16:16

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