Openlayers circle Polygon on OpenStreetMaps layer
I'm trying to create a circle with a defined center and put an icon marker on it. The code is working if I use images instead of OpenLayers.Geometry.Polygon.createRegularPolygon. I wasn't able to solve it.
here you find my code:
<html>
<head>
<title>OpenLayers Example</title>
<script src="http://www.openlayers.org/api/OpenLayers.js"></script>
</head>
<body>
<div id="mapdiv"></div>
<script>
map = new OpenLayers.Map("mapdiv");
map.addLayer(new OpenLayers.Layer.OSM());
epsg4326 = new OpenLayers.Projection("EPSG:4326"); //WGS 1984 projection
projectTo = map.getProjectionObject(); //The map projection (Spherical Mercator)
var lonLat = new OpenLayers.LonLat( -0.1279688 ,51.5077286 ).transform(epsg4326, projectTo);
var zoom=6;
map.setCenter (lonLat, zoom);
var mycircle = OpenLayers.Geometry.Polygon.createRegularPolygon(
new OpenLayers.Geometry.Point( lonLat ),
1,
30
);
var featurecircle = new OpenLayers.Feature.Vector(mycircle);
var vectorLayer = new OpenLayers.Layer.Vector("Overlay");
// Define markers as "features" of the vector layer:
vectorLayer.addFeatures(featurecircle);
var feature = new OpenLayers.Feature.Vector(
new OpenLayers.Geometry.Point( -0.1244324, 51.5006728 ).transform(epsg4326, projectTo),
{description:'info'} ,
{externalGraphic: 'img/marker.png', graphicHeight: 25, graphicWidth: 21, graphicXOffset:-12, graphicYOffset:-25 }
);
vectorLayer.addFeatures(feature);
map.addLayer(vectorLayer);
</script>
</body>
</html>
Thanks in advance for any tips.
Answer
OpenLayers.Geometry.Point constructor takes in x,y not lonlat obj. When you're creating the circle new OpenLayers.Geometry.Point( lonLat ) should be new OpenLayers.Geometry.Point(lonLat.lon, lonLat.lat);
This should work better:
map = new OpenLayers.Map("mapdiv");
map.addLayer(new OpenLayers.Layer.OSM());
epsg4326 = new OpenLayers.Projection("EPSG:4326"); //WGS 1984 projection
projectTo = map.getProjectionObject(); //The map projection (Spherical Mercator)
var lonLat = new OpenLayers.LonLat(-0.1279688, 51.5077286).transform(epsg4326, projectTo);
var zoom = 6;
map.setCenter(lonLat, zoom);
var vectorLayer = new OpenLayers.Layer.Vector("Overlay");
var point = new OpenLayers.Geometry.Point(lonLat.lon, lonLat.lat);
var mycircle = OpenLayers.Geometry.Polygon.createRegularPolygon
(
point,
50000,
40,
0
);
var featurecircle = new OpenLayers.Feature.Vector(mycircle);
var featurePoint = new OpenLayers.Feature.Vector(
point,
{ description: 'info' },
{ externalGraphic: 'img/marker.png', graphicHeight: 25, graphicWidth: 21, graphicXOffset: -12, graphicYOffset: -25 }
);
vectorLayer.addFeatures([featurePoint, featurecircle]);
map.addLayer(vectorLayer);