--- a/flys-artifacts/ChangeLog	Mon Oct 10 07:47:30 2011 +0000
+++ b/flys-artifacts/ChangeLog	Mon Oct 10 08:35:30 2011 +0000
@@ -1,3 +1,13 @@
+2011-10-10  Ingo Weinzierl <ingo@intevation.de>
+
+	flys/issue150 (Diagramm: Anzeige von W bergauf)
+	flys/issue345 (W-INFO / Wasserspiegellagenberechnung, Diagrammausgabe)
+
+	* src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java:
+	  Corrected the determination to invert the x axis, so that waterlines
+	  will start with their highest value at the left and end with their
+	  lowest values at the right.
+
 2011-10-10  Felix Wolfsteller <felix.wolfsteller@intevation.de>
 
 	* src/main/java/de/intevation/flys/artifacts/math/DifferenceCurveFacet.java:

--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java	Mon Oct 10 07:47:30 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/LongitudinalSectionGenerator.java	Mon Oct 10 08:35:30 2011 +0000
@@ -173,7 +173,7 @@
     protected void invertXAxis(ValueAxis xaxis) {
 
         if (inverted) {
-            logger.debug("Invert X-Axis.");
+            logger.debug("X-Axis.setInverted(true)");
             xaxis.setInverted(true);
         }
     }
@@ -245,29 +245,13 @@
 
         int size = wqkms.size();
 
-        boolean wsUp = wqkms.guessWaterIncreasing();
-        boolean kmUp = DataUtil.guessWaterIncreasing(wqkms.allKms());
-        boolean inv  = !(kmUp && !wsUp);
-
-        if (logger.isDebugEnabled()) {
-            logger.debug("Generate series: " + series.getKey());
-            logger.debug("Values  : " + size);
-            if (size > 0) {
-                logger.debug("Start km: " + wqkms.getKm(0));
-                logger.debug("End   km: " + wqkms.getKm(size-1));
-            }
-            logger.debug("wsUp: " + wsUp);
-            logger.debug("kmUp: " + kmUp);
-            logger.debug("inv:  " + inv);
-        }
-
         for (int i = 0; i < size; i++) {
             series.add(wqkms.getKm(i), wqkms.getW(i));
         }
 
         addFirstAxisSeries(series, visible);
 
-        if (inv) {
+        if (needInvertAxis(wqkms)) {
             setInverted(true);
         }
     }
@@ -286,24 +270,45 @@
 
         int size = wqkms.size();
 
-        if (logger.isDebugEnabled()) {
-            if (wqkms.size() > 0) {
-                logger.debug("Generate series: " + series.getKey());
-                logger.debug("Start km: " + wqkms.getKm(0));
-                logger.debug("End   km: " + wqkms.getKm(size-1));
-                logger.debug("Values  : " + size);
-            }
-        }
-
         for (int i = 0; i < size; i++) {
             series.add(wqkms.getKm(i), wqkms.getQ(i));
         }
 
         addSecondAxisSeries(series, visible);
 
-        //if (wqkms.guessWaterIncreasing()) {
-        //    setInverted(true);
-        //}
+        if (needInvertAxis(wqkms)) {
+            setInverted(true);
+        }
+    }
+
+
+    /**
+     * This method determines - taking JFreeCharts auto x value ordering into
+     * account - if the x axis need to be inverted. Waterlines in these charts
+     * should decrease.
+     *
+     * @param wqkms The data object that stores the x and y values used for this
+     * chart.
+     */
+    public boolean needInvertAxis(WQKms wqkms) {
+        boolean wsUp = wqkms.guessWaterIncreasing();
+        boolean kmUp = DataUtil.guessWaterIncreasing(wqkms.allKms());
+        boolean inv = (wsUp && kmUp) || (!wsUp && !kmUp);
+
+        int size = wqkms.size();
+
+        if (logger.isDebugEnabled()) {
+            logger.debug("Values  : " + size);
+            if (size > 0) {
+                logger.debug("Start km: " + wqkms.getKm(0));
+                logger.debug("End   km: " + wqkms.getKm(size-1));
+            }
+            logger.debug("wsUp: " + wsUp);
+            logger.debug("kmUp: " + kmUp);
+            logger.debug("inv:  " + inv);
+        }
+
+        return inv;
     }