title: Bing Map latlong to pixel calculations
body: <p>I am trying to do a task that involves Bing maps where I need to know the pixel location of a particular lat long pin item.</p>
  
  <p>I am using the Bing map SDK to do this using the function LocationToViewportPoint that was provided by Bing maps.</p>
  
  <p>I am worried that this may be affection performance of my application and was wondering if it would be more efficient to write my own function that can achieve this. The problem I am not sure how to achieve this if I was to write my own function as obviously the function would output different values at different zoom levels?</p>
  
  <p>Any guidance is appreciated.</p>
  
  <p>Thanks</p>