This example demonstrates the problem:
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<style type="text/css">
#map {
width: 800px;
height: 475px;
border: 1px solid black;
}
</style>
<script src="../lib/OpenLayers.js" type="text/javascript"></script>
<script type="text/javascript">
var map;
var vectors;
function init(){
map = new OpenLayers.Map('map');
var wms = new OpenLayers.Layer.WMS(
"OpenLayers WMS",
"http://labs.metacarta.com/wms/vmap0",
{layers: 'basic'}
);
vectors = new OpenLayers.Layer.Vector(
"Simple Geometry",
{
styleMap: new OpenLayers.StyleMap({
externalGraphic: "../img/marker-gold.png",
pointRadius: 10
})
}
);
map.addLayers([wms, vectors]);
var features = [];
var x = -111.04;
var y = 45.68;
for(var i = 0; i < 10; i++){
x += i * .5;
y += i * .1;
features.push(
new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Point(x, y)
)
);
}
map.setCenter(new OpenLayers.LonLat(x, y), 5);
vectors.addFeatures(features);
};
</script>
</head>
<body onload="init()">
<div id="map"></div>
<p>Use the pan buttons. See flicker at end of animated pan.</p>
</body>
</html>
