--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/WDifferencesCurveGenerator.java	Mon Sep 12 09:06:05 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/WDifferencesCurveGenerator.java	Mon Sep 12 11:26:32 2011 +0000
@@ -13,10 +13,11 @@
 import de.intevation.artifactdatabase.state.Facet;
 
 import de.intevation.flys.artifacts.FLYSArtifact;
-
 import de.intevation.flys.artifacts.model.FacetTypes;
 import de.intevation.flys.artifacts.model.WKms;
 
+import de.intevation.flys.utils.DataUtil;
+
 
 /**
  * An OutGenerator that generates w differences curves.
@@ -93,25 +94,28 @@
         if (wkms == null) {
             logger.warn("No data to add to WDifferencesChart.");
             return;
+         }
+
+        int size = wkms.size();
+        XYSeries series = new StyledXYSeries(seriesName, theme);
+
+        if (logger.isDebugEnabled()) {
+            if (wkms.size() > 0) {
+                logger.debug("Generate series: " + series.getKey());
+                logger.debug("Start km: " + wkms.getKm(0));
+                logger.debug("End   km: " + wkms.getKm(size-1));
+                logger.debug("Values  : " + size);
+            }
         }
 
-       int size = wkms.size();
-       XYSeries series = new StyledXYSeries(seriesName, theme);
+        for (int i = 0; i < size; i++) {
+            series.add(wkms.getKm(i), wkms.getW(i));
+        }
 
-       if (logger.isDebugEnabled()) {
-           if (wkms.size() > 0) {
-               logger.debug("Generate series: " + series.getKey());
-               logger.debug("Start km: " + wkms.getKm(0));
-               logger.debug("End   km: " + wkms.getKm(size-1));
-               logger.debug("Values  : " + size);
-           }
-       }
-
-       for (int i = 0; i < size; i++) {
-           series.add(wkms.getKm(i), wkms.getW(i));
-       }
-
-       addFirstAxisSeries(series);
+        addFirstAxisSeries(series);
+        if (DataUtil.guessWaterIncreasing(wkms)) {
+            setInverted(true);
+        }
     }