private double averageLatitude() {
		double totalLatitude = 0.0;
		double nbrOfLocations = locations.size();
		for(int i = 0; i < nbrOfLocations; i++) {
			totalLatitude += locations.get(i).getLatitude();
		}
		
		double averageLatitude = nbrOfLocations != 0 ? totalLatitude / nbrOfLocations : 0.0; 
		return averageLatitude;
	}