def METHOD_NAME(self, lng, lat, value):
    """Add a data point to this data set.
    Args:
        lng (float): The longitude for this reading.
        lat (float): The latitude fo this reading.
        value (tuple): The value of the reading.
    """
    itt_x, itt_y = util.get_grid_coordinates(lng, lat, self.domain,
                                             self.resolution)
    try:
        self.data[itt_y][itt_x].append(self.VALUE_MAP[value])
    except KeyError:
        pass