map color as private field

data/input/northeastamerica/RIO_obs_NEA.xml

@@ -6,6 +6,7 @@
 				<environment.RIOBasinNetworkObserverWithContinent>
 					<title>North East America</title>
 					<threshold>1000000</threshold>
+					<colorScaleEnum>RedsScale</colorScaleEnum>
 				</environment.RIOBasinNetworkObserverWithContinent>
 
 				<environment.RIOBasinNetworkObserverPresence>

src/main/java/environment/RIOBasinNetworkObserverWithContinent.java

@@ -41,7 +41,7 @@ public class RIOBasinNetworkObserverWithContinent extends ObserverListener
 	private double threshold = 13000000.;
 
 	@Description(name = "Color scale", tooltip = "")
-	public ColorScaleEnum colorScaleEnum = ColorScaleEnum.RedsScale;
+	private ColorScaleEnum colorScaleEnum = ColorScaleEnum.RedsScale;
 
 	// a basin network
 	private transient RIOBasinNetworkWithContinent bn;
@@ -299,7 +299,9 @@ public class RIOBasinNetworkObserverWithContinent extends ObserverListener
 				for (DiadromousFishGroup group : basin.getGroups()) {
 					abundance += basin.getEffective(group);
 				}
-				// System.out.println(basin.getName()+ "-->"+abundance);
+				if (basin instanceof RiverBasin & abundance > 0)
+					System.out.println("  " + basin.getName() + " (" + basin.getClass().getSimpleName() + ") -->" + abundance);
+
 				if (abundance == 0.) {
 					g.setColor(Color.WHITE);
 				} else {