Method: CloudMade::TilesService#xtile

Defined in:
lib/cloudmade/tiles.rb

#xtile(lon, zoom) ⇒ Object 



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# File 'lib/cloudmade/tiles.rb', line 63

def xtile(lon, zoom)
  factor = 2**(zoom - 1)
  xtile = 1 + lon / 180.0
  return (xtile * factor).to_i
end