text: class Cell:
      def __init__(self, longitude, latitude):
          self.longitude = longitude
          self.latitude = latitude
          self.density = 0
          self.density_norm = 0
          self.color = 0
      def addUsage(self):
          self.density+=1
      def getLatLon(self):
          return (self.latitude,self.longitude)
      def __str__(self):
          return "[" + str(self.longitude) + "," + str(self.latitude)+ "]"
  