[OpenLayers-Users] Openlayers circle Polygon on OpenStreetMaps layer

Fri Mar 16 05:03:59 EDT 2012

Thanks a lot! I solved using radius 100000 and tranforming coordinates:

epsg4326 =  new OpenLayers.Projection("EPSG:4326"); //WGS 1984 projection
projectTo = map.getProjectionObject(); //The map projection (Spherical Mercator)

new OpenLayers.Geometry.Point( {{ long }} ,{{ lat }}
).transform(epsg4326, projectTo),

On 16 March 2012 00:02, Arnd Wippermann <arnd.wippermann at web.de> wrote:
> Hi,
>
> Try to use a much larger radius for your regular polygon like 10000.
>
> Arnd
>
> -----Ursprüngliche Nachricht-----
> Von: openlayers-users-bounces at lists.osgeo.org
> [mailto:openlayers-users-bounces at lists.osgeo.org] Im Auftrag von Fabrizio
> Buratta
> Gesendet: Donnerstag, 15. März 2012 17:23
> An: openlayers-users at lists.osgeo.org
> Betreff: [OpenLayers-Users] 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.
>
> --
> Fab
>
> http://twitter.com/extremoburo
>
> http://www.linkedin.com/in/fburatta
>
> http://www.nonfateviprenderedalpanico.it
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-- 
Fab

http://twitter.com/extremoburo

http://www.linkedin.com/in/fburatta

http://www.nonfateviprenderedalpanico.it