Index: trunk/SDToolBox/extract_data.py
===================================================================
diff -u -r198 -r199
--- trunk/SDToolBox/extract_data.py	(.../extract_data.py)	(revision 198)
+++ trunk/SDToolBox/extract_data.py	(.../extract_data.py)	(revision 199)
@@ -118,7 +118,7 @@
         # positions where we are in the sea
         logging.info(f"Generating sea mask with mask: {sea_mask}")
 
-        return sea_mask, LON, LAT
+        return sea_mask, LON[np.argsort(LON[:, 1])], LAT[np.argsort(LAT[:, 1])]
 
     @staticmethod
     def get_seamask(mask_filepath: Path,) -> Tuple[np.array, np.array, np.array]:
Index: trunk/tests/test_acceptance.py
===================================================================
diff -u -r196 -r199
--- trunk/tests/test_acceptance.py	(.../test_acceptance.py)	(revision 196)
+++ trunk/tests/test_acceptance.py	(.../test_acceptance.py)	(revision 199)
@@ -229,11 +229,11 @@
         self, variable_key: str
     ):
         steplon = 0.5
-        lonl = 5
+        lonl = 3
         lonr = 7.5
         steplat = 0.5
         latl = 52.5
-        latu = 55
+        latu = 57
         coordsBOX = {
             "LON": np.arange(lonl, lonr + steplon, steplon).tolist(),
             "LAT": np.arange(latl, latu + steplat, steplat).tolist(),