--- a/flys-artifacts/src/main/java/de/intevation/flys/exports/CrossSectionGenerator.java	Tue Dec 20 06:39:20 2011 +0000
+++ b/flys-artifacts/src/main/java/de/intevation/flys/exports/CrossSectionGenerator.java	Tue Dec 20 06:47:08 2011 +0000
@@ -148,7 +148,7 @@
                 attr,
                 visible);
         }
-        else if (name.equals(AREA)) {
+        else if (FacetTypes.IS.AREA(name)) {
             doArea(artifactFacet.getData(context),
                 artifactFacet.getFacetDescription(),
                 attr,
@@ -160,6 +160,7 @@
         }
     }
 
+
     /**
      * Do Area out.
      */
@@ -170,16 +171,43 @@
         boolean    visible
     ) {
         logger.debug("CrossSectionGenerator.doArea");
+        StyledAreaSeriesCollection area = new StyledAreaSeriesCollection(theme);
 
         // TODO make this more stable.
         Object[] doubles = (Object[]) o;
-        XYSeries up   = new StyledXYSeries("up",   false, theme);
-        XYSeries down = new StyledXYSeries("down", false, theme);
-        StyledSeriesBuilder.addPoints(up,   (double [][]) doubles[0]);
-        StyledSeriesBuilder.addPoints(down, (double [][]) doubles[1]);
-        addAreaSeries(up, down, 0, visible);
+        XYSeries up   = null;
+        XYSeries down = null;
+
+        if (doubles[1] != null) {
+            up = new StyledXYSeries(seriesName, false, theme);
+            StyledSeriesBuilder.addPoints(up, (double [][]) doubles[1]);
+        }
+
+        if (doubles[0] != null) {
+            // TODO: Sort this out: when the two series have the same name,
+            // the renderer (or anything in between) will not work correctly.
+            down = new StyledXYSeries(seriesName + " ", false, theme);
+            StyledSeriesBuilder.addPoints(down, (double [][]) doubles[0]);
+        }
+
+        if (up == null && down != null) {
+            area.setMode(StyledAreaSeriesCollection.FILL_MODE.ABOVE);
+            down.setKey(seriesName);
+            area.addSeries(down);
+        }
+        else if (up != null && down == null) {
+            area.setMode(StyledAreaSeriesCollection.FILL_MODE.UNDER);
+            area.addSeries(up);
+        }
+        else if (up != null && down != null) {
+            area.setMode(StyledAreaSeriesCollection.FILL_MODE.BETWEEN);
+            area.addSeries(up);
+            area.addSeries(down);
+        }
+        addAreaSeries(area, 0, visible);
     }
 
+
     /**
      * Do cross sections waterline out.
      *