Използвайки следния код, получавам желания резултат, т.е. получавам полилинията на зададената ми ширина, дължина
<html>
<head>
<title>OpenLayers Example</title>
<script src="http://openlayers.org/api/OpenLayers.js"></script>
</head>
<body>
<div style="width:100%; height:100%" id="map"></div>
<script defer="defer" type="text/javascript">
var map = new OpenLayers.Map('map');
var wms = new OpenLayers.Layer.WMS( "OpenLayers WMS",
"http://vmap0.tiles.osgeo.org/wms/vmap0", {layers: 'basic'} );
var start_point = new OpenLayers.Geometry.Point(0,10);
var start_point_1= new OpenLayers.Geometry.Point(0,15);
var start_point_2= new OpenLayers.Geometry.Point(5,20);
var end_point = new OpenLayers.Geometry.Point(30,0);
var end_point_1 = new OpenLayers.Geometry.Point(40,0);
var myTrip =[start_point, start_point_1, start_point_2 , end_point, end_point_1];
var vector = new OpenLayers.Layer.Vector();
vector.addFeatures([new OpenLayers.Feature.Vector(new OpenLayers.Geometry.LineString(myTrip ))]);
map.addLayers([vector]);
map.addLayers([wms]);
map.zoomToMaxExtent();
</script>
</body>
</html>
Изход
Но когато използвам карта на Google, тя не работи, т.е. показва ми проста карта.
<html>
<head>
<title>OpenLayers Example</title>
<script src="http://openlayers.org/api/OpenLayers.js"></script>
<script src="http://maps.google.com/maps/api/js?v=3.2&sensor=false"></script>
</head>
<body>
<div style="width:100%; height:100%" id="map"></div>
<script defer="defer" type="text/javascript">
var map = new OpenLayers.Map('map');
var wms = new OpenLayers.Layer.Google(
"Google Streets", // the default
{numZoomLevels: 20}
);
var lonlat = new OpenLayers.LonLat(73.589,19.54).transform(
new OpenLayers.Projection("EPSG:4326"), // transform from WGS 1984
new OpenLayers.Projection("EPSG:900913") // to Spherical Mercator
);
var zoom = 7;
var start_point = new OpenLayers.Geometry.Point(0,10);
var start_point_1= new OpenLayers.Geometry.Point(0,15);
var start_point_2= new OpenLayers.Geometry.Point(5,20);
var end_point = new OpenLayers.Geometry.Point(30,0);
var end_point_1 = new OpenLayers.Geometry.Point(40,0);
var myTrip =[start_point, start_point_1, start_point_2 , end_point, end_point_1];
var vector = new OpenLayers.Layer.Vector();
vector.addFeatures([new OpenLayers.Feature.Vector(new OpenLayers.Geometry.LineString(myTrip ))]);
map.addLayers([vector]);
map.addLayer(wms);
map.zoomToMaxExtent();
map.setCenter(lonlat, zoom);
</script>
</body>
</html>
изход
Защо това не работи, как мога да накарам това да работи. Ако вместо openlayer директно използвам API на Google Map, мога да получа желания резултат.