def latlon2tilenums(lat, lon, zoom)
      factor = 2**(zoom - 1)
      lat = radians(lat)
      lon = radians(lon)
      xtile = 1 + lon / Math::PI
      ytile = 1 - Math.log(Math.tan(lat) + (1 / Math.cos(lat))) / Math::PI
      return Point.new((xtile * factor).to_i, (ytile * factor).to_i)
    end
def latlon2tilenums(lat, lon, zoom)
      factor = 2**(zoom - 1)
      lat = radians(lat)
      lon = radians(lon)
      xtile = 1 + lon / Math::PI
      ytile = 1 - Math.log(Math.tan(lat) + (1 / Math.cos(lat))) / Math::PI
      return Point.new((xtile * factor).to_i, (ytile * factor).to_i)
    end
def latlon2tilenums ( lat , lon , zoom ) factor = 2 ** ( zoom - 1 ) lat = radians ( lat ) lon = radians ( lon ) xtile = 1 + lon / Math :: PI ytile = 1 - Math . log ( Math . tan ( lat ) + ( 1 / Math . cos ( lat ) ) ) / Math :: PI return Point . new ( ( xtile * factor ) . to_i , ( ytile * factor ) . to_i ) end
Convert latitude, longitude pair to tile coordinates. Returns tile coordinates as a CloudMade::Point object
 * +lat+ Latitude
 * +lon+ Longitude
 * +zoom+ Zoom level
Convert latitude longitude pair to tile coordinates . Returns tile coordinates as a CloudMade :: Point object * + lat + Latitude * + lon + Longitude * + zoom + Zoom level