private void updateStopMarkers() {
		currentGTFSStopsMarker = new HashSet<Stop>();
		currentOSMStopsMarker = new HashSet<Stop>();
		if (currentGTFSStops.size() == 0 || currentOSMStops.size() == 0){
			return;
		}else{
			for (Stop s:currentGTFSStops)
				if (currentOSMStops.contains(s) && currentGTFSStops.indexOf(s) >= currentOSMStops.indexOf(s)){
					//equals
				}else{
					currentGTFSStopsMarker.add(s);
				}
			for (Stop s:currentOSMStops)
				if (currentGTFSStops.contains(s) && currentGTFSStops.indexOf(s) <= currentOSMStops.indexOf(s)){
					//equals
				}else{
					currentOSMStopsMarker.add(s);
				}
		}
		osmStopList.repaint();
		gtfsStopList.repaint();
	}