--- a/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/QRangeTree.java	Mon Jan 21 12:49:44 2013 +0100
+++ b/flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/QRangeTree.java	Mon Jan 21 14:03:22 2013 +0100
@@ -145,6 +145,23 @@
             last = QRangeTree.this.findNode(pos);
             return last != null ? last.q : Double.NaN;
         }
+
+        public double [] findQs(double [] kms, Calculation report) {
+            return findQs(kms, new double[kms.length], report);
+        }
+
+        public double [] findQs(
+            double []    kms, 
+            double []   qs, 
+            Calculation report
+        ) {
+            for (int i = 0; i < kms.length; ++i) {
+                if (Double.isNaN(qs[i] = findQ(kms[i]))) {
+                    report.addProblem(kms[i], "cannot.find.q");
+                }
+            }
+            return qs;
+        }
     } // class QuickQFinder
 
     protected Node root;