store.each(function(rec) {
	var layers = [];

	var node = LayerTree.root.findChild('text', rec.text, true);
	if (node === null) {
		layers.push(
			new Ext.tree.TreeNode({
				text: rec.data.abstract,
				layer: rec.data.abstract,
				leaf: true,
				checked: true
			})
		);
	}

	LayerTree.root.appendChild(layers);
});