title: How to get the pixel size of the full map?
body: <p>I have partial map of the world (like America or Africa). and I need to know to pixel size of the world map based on the size of the partial/cropped map pixel size.</p>
  
  <p>I have the size in pixel of the partial map (like <code>480x256</code>), and I have the <code>minLongitude,maxlongitude,minlatitude,maxlatitude</code> (aka left,right,top,bottom edge)</p>
  
  <p>I know that longitude is easy because linear : </p>
  
  <p><code>FULL_CIRCLE_DEG = 360</code></p>
  
  <p><code>longitudeDelta = (maxLongitude-minLongitude)/FULL_CIRCLE_DEG</code></p>
  
  <p><code>MapFullSize = mapCroppedWidth/longitudeDelta</code></p>
  
  <p>But for the latitude, it's kind of different:</p>
  
  <p><code>FULL_LATITUDE_DEG = MAX_LAT_ON_EARTH - MIN_LAT_ON_EARTH</code> (like 85.7543...-(-85.7543...))</p>
  
  <p><code>latitudeDelta = (maxLatitude-minLatitude)/FULL_LATITUDE_DEG</code></p>
  
  <p><code>MapFullHeight = ????</code></p>
  
  <p>Please someone can help me ?</p>
  
  <p>I find lot of algorithm to get a GPScoordinateToPixel conversion but nothing on square calculation.</p>
  
  <p>Thank you.</p>