title: Adding squares to a map sized by their area
body: <p>I'm encountering a brick wall trying to add squares to my map.  I'm using the wonderful Leaflet.draw plugin, but it only supports Rectangles.  Each square has to be of the same area: 25miles^2.  I tried using icons but they don't resize on zoom, and I don't necessarily want to resort to disabling zooming. Furthermore, I noticed that while panning around my map, the scale was constantly adjusting. This leads me to believe that even at the same zoom level, a 20mile square will be shaped differently.</p>
  
  <p>It seems like the only way to add shapes to the map is with Lat and Lng, so I know I have to come up with a way to convert LatLng to Area and vice-versa.</p>
  
  <p>Looking for any feedback whatsoever! Thanks</p>