# Draw a centered ellipse

1. ##### Sonia
90 posts
Member since:
Mar 2012

Posted 15 Mar 2012 Link to this post

How can i draw a ellipse centered on lat, lon position?
Thank you.
2. ##### Sonia
90 posts
Member since:
Mar 2012

Posted 15 Mar 2012 Link to this post

I found the solution
`// Calculate ellipse size in degrees (latitude-longitude). `
`Size degreeSize = map.GetLatitudeLongitudeSize(p, ellipseWidth, ellipseHeight);`

`// Calculate new ellipse location.  `
`Location ellipseLocation = new Location(p.Latitude + degreeSize.Height / 2, p.Longitude - degreeSize.Width / 2);`

I hope it can be useful for anybody.
3. ##### Andrey
1681 posts

Posted 20 Mar 2012 Link to this post

Hello Sonia,

We are glad that you managed to resolve this on your own.
Here's another approach to achieve te same - you can use the hotspot feature for positioning any framework element relative to geographical coordinates. For more information please take a look at the following help topic and example:
http://demos.telerik.com/Silverlight/#Map/HotSpot

Then you can use the MapEllipseGeometry. The sample code is below.

`<``Grid ``x:Name``=``"LayoutRoot" ``Background``=``"White"``>`
`    ``<``telerik:RadMap ``x:Name``=``"radMap"`
`                    ``Center``=``"42.6957539183824, 23.3327663758679"`
`                    ``ZoomLevel``=``"10"``>`
`        ``<``telerik:RadMap.Providers``>`
`            ``<``telerik:OpenStreetMapProvider ``/>`
`        ``</``telerik:RadMap.Providers``>`
`        ``<``telerik:InformationLayer ``x:Name``=``"informationLayer"``>`
`            ``<``telerik:MapPath ``Fill``=``"Red" ``Opacity``=``"0.5"`
`                             ``Stroke``=``"Orange" ``StrokeThickness``=``"2"``>`
`                ``<``telerik:MapPath.Data``>`
`                    ``<``telerik:MapEllipseGeometry ``Center``=``"42.6957539183824, 23.3327663758679"`
`                                                ``RadiusX``=``"10" ``RadiusY``=``"10"``/>`
`                ``</``telerik:MapPath.Data``>`
`            ``</``telerik:MapPath``>`
`        ``</``telerik:InformationLayer``>`
`    ``</``telerik:RadMap``>`
`</``Grid``>`

All the best,
Andrey Murzov
the Telerik team

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