Index: /issm/trunk-jpl/src/m/coordsystems/ll2xy.py
===================================================================
--- /issm/trunk-jpl/src/m/coordsystems/ll2xy.py	(revision 27523)
+++ /issm/trunk-jpl/src/m/coordsystems/ll2xy.py	(revision 27524)
@@ -13,32 +13,32 @@
         x, y = ll2xy(lat, lon, sgn, central_meridian, standard_parallel)
 
-    - sgn = Sign of latitude	1 : north latitude (default is mer = 45 lat = 70)
-    						   -1 : south latitude (default is mer = 0  lat = 71)
+    - sgn = Sign of latitude    1 : north latitude (default is mer = 45 lat = 70)
+                               -1 : south latitude (default is mer = 0  lat = 71)
     """
     assert sgn == 1 or sgn == -1, 'error: sgn should be either 1 or -1'
-	 
-	 # Get central_meridian and standard_parallel depending on hemisphere
+
+         # Get central_meridian and standard_parallel depending on hemisphere
     if len(args) == 2:
-       delta = args[0]
-       slat = args[1]
+        delta = args[0]
+        slat = args[1]
     elif len(args) == 0:
-       if sgn == 1:
-          delta = 45.
-          slat = 70.
-          print('        ll2xy: creating coordinates in north polar stereographic (Std Latitude: 70degN Meridian: 45deg)')
-       elif sgn == -1:
-          delta = 0.
-          slat = 71.
-          print('        ll2xy: creating coordinates in south polar stereographic (Std Latitude: 71degS Meridian: 0deg)')
-       else:
-          raise ValueError('sgn should be either 1 or -1')
+        if sgn == 1:
+            delta = 45.
+            slat = 70.
+            print('        ll2xy: creating coordinates in north polar stereographic (Std Latitude: 70degN Meridian: 45deg)')
+        elif sgn == -1:
+            delta = 0.
+            slat = 71.
+            print('        ll2xy: creating coordinates in south polar stereographic (Std Latitude: 71degS Meridian: 0deg)')
+        else:
+            raise ValueError('sgn should be either 1 or -1')
     else:
-       raise Exception('bad usage: type "help(ll2xy)" for details')
+        raise Exception('bad usage: type "help(ll2xy)" for details')
 
     # if lat, lon passed as lists, convert to np.arrays
     if type(lat) != "np.ndarray":
-       lat = np.array(lat)
+        lat = np.array(lat)
     if type(lon) != "np.ndarray":
-       lon = np.array(lon)
+        lon = np.array(lon)
 
     # Conversion constant from degrees to radians