title: Get Latitude and Longitude of upper left corner of a Bing Map
body: <p>I programatically create requests to dev.virtualearth.net (Bing static maps).
  I know the following values:</p>
  
  <ul>
  <li>Center Point (Latitude &amp; Longitude)</li>
  <li>Zoom Level</li>
  <li>Map Size (X pixels, Y pixels)</li>
  </ul>
  
  <p>After I recieved the map as a bitmap, how do I determine the Coordinates (Latitude and Longitude) of the upper left corner (basically the very first pixel) and the lower right corner (the very last pixel)?</p>
  
  <p>I just need some suggestions or some pseudo code. Note, that while I know the Center Point, Zoom Level and Map Size, these aren't the same for every request.</p>
  
  <p>Thank you.</p>