Este exemplo demonstra como poderá alterar o estilo da linha (polyline).
<html>
<head>
<title>Polyline Custom Style</title>
<script type="text/javascript" src="http://js.sapo.pt/Bundles/SAPOMapsAPI.js"></script>
<script type='text/javascript'>
function init() {
var map = new SAPO.Maps.Map('mapDiv');
var polyline = new SAPO.Maps.Polyline([new OpenLayers.LonLat(-9, 38),
new OpenLayers.LonLat(-8, 38),
new OpenLayers.LonLat(-9, 39),
new OpenLayers.LonLat(-9, 37)
],
{
strokeColor: '#000000',
strokeOpacity: 1,
strokeWidth: 6,
strokeDashstyle: 'dot'
});
map.addOverlay(polyline);
}
</script>
</head>
<body onload='init();'>
<div id='mapDiv' style='width:980px; height:400px;'></div>
</body>
</html>