--- a/flys-artifacts/ChangeLog	Thu Apr 21 08:49:58 2011 +0000
+++ b/flys-artifacts/ChangeLog	Fri Apr 22 09:57:27 2011 +0000
@@ -1,3 +1,34 @@
+2011-04-22	Sascha L. Teichmann	<sascha.teichmann@intevation.de>
+
+	* src/main/java/de/intevation/flys/artifacts/math/BackJumpCorrector.java:
+
+	  Implementation of the "Ruecksprungkorrektur" to be done in
+	  "W fuer angepassten Abflusslaengschnitt".
+
+	  All tests show the expected results. In some corner cases the
+	  algorithm described in the "Anwenderhandbuch" chapter 3.3.4.3 "Korrektur"
+	  has some definition shortcomings:
+
+	  a - What should happend when you cannot find point 2 because
+	      you cannot step back one quarter from point 3 because there
+		  is no data there any more (river too short in this direction)?
+		  The implemented algorithm raises point 3' only to an
+		  according factor. E.g. If you can step back the whole quarter
+		  distance the elevation is the full quarter. If you can
+		  step back only the half of the quarter the elevation is
+		  only an eighth.
+
+	  b - If the water heights between point 2 and 3 are constant then
+	      the algorithm will produce a spline interpolation that
+		  lowers those values. Is this intended?
+
+	  For real data the back jumps are expected to be more in the middle
+	  of the distance ranges so the corner cases are maybe not so
+	  important.
+
+	* src/main/java/de/intevation/flys/artifacts/states/RiverSelect.java:
+	  Removed superfluous import.
+
 2011-04-21  Ingo Weinzierl <ingo@intevation.de>
 
 	* src/main/java/de/intevation/flys/themes/ThemeFactory.java: Removed debug