iphone - How to display the radius in MKCircle on Map in meters -

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I need to use MKCircle on a circle of 1.23 meters of radius on MkMapView. How do I show that on the map I used the following, 

  r = 1.23; // circle in meters = [center coordinates with MK script cycle: position radius: r];   
 But when I drag it on the map it looks like more than 1 km on the Mkmap scenario. Can anyone tell me how can I represent the radius of 1.23 meters on the map ??  
 This is primarily to show the accuracy of the location, so the radius shows the accuracy of the location. In  viewForOverlay  delegate method, try setting  lineWidth   
 
 
 / Code> to  MKCircleView >  
 I think the default width of 0 is in the "width of the road".

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