return map;

}

function mk_all_refpoints_layer() {

	var layer = new OpenLayers.Layer.Vector(

		"Reference points",{

			projection: new OpenLayers.Projection("EPSG:4326"),

			strategies: [new OpenLayers.Strategy.Fixed()],

			protocol: new OpenLayers.Protocol.HTTP({

				url: 'ajax/ref_points.php',

				format: new OpenLayers.Format.GeoJSON(),

			})

		});

	return layer;

function add_refpoint_control(layer, map) {

	var selectControl ;

	selectControl = new OpenLayers.Control.SelectFeature(

		layer,{

			onSelect:function(feature) {

				var popup = new OpenLayers.Popup.FramedCloud(

					feature.attributes.name,

					feature.geometry.getBounds().getCenterLonLat(),

					null,

					"<div>" + feature.attributes.name+"</div>",

					null, true, function() {selectControl.unselect(feature);});

				feature.popup = popup;

				map.addPopup(popup);},

			onUnselect:function(feature) {

				map.removePopup(feature.popup);

				feature.popup.destroy();

				feature.popup = null;

			}});

	map.addControl(selectControl);

	selectControl.activate();

}