title: How much longitude and latitude does a pixel represent in Google Maps with zero zoom?
body: <p>In the documentation about this topic <a href="https://developers.google.com/maps/documentation/javascript/maptypes#MapCoordinates" rel="nofollow noreferrer">posted here</a> it mentions that the top left corner of <a href="https://developers.google.com/maps/documentation/javascript/images/pixelCoordinates.png" rel="nofollow noreferrer">this 256x256 pixel Mercator world map</a> has the coordinates 180° longitude y aprox. 85° latitude.</p>
  
  <p>I'm developing a Unity3D application (using C#) in which I need to <strong>superpose different items on top of a map</strong> that I have retrieved using simple GET HTTP requests to <strong>the Google Maps API</strong> (maps.googleapis.com/maps/api/staticmap), so I need to know which the base scale is so I can extrapolate all the other scales with the mentioned base-2 sizes of every zoom value.</p>