diff --git a/docs/config.rst b/docs/config.rst
index 333fee3..5473cd3 100644
--- a/docs/config.rst
+++ b/docs/config.rst
@@ -336,19 +336,18 @@ values. The valid configuration keys are listed below.
 
 ``crop``
     You can use this to render a small subset of your map, instead of the entire
-    thing. The format is (min x, max x, min z, max z).
+    thing. The format is (min x, min z, max x, max z).
 
     (The coordinates are block coordinates. The same you get with the debug menu
     in-game)
 
-    Example that only renders a 1000 by 1000 square of land around the origin::
+    Example that only renders a 1000 by 1000 square of land about the origin::
 
         renders['myrender'] = {
                 'world': 'myworld',
                 'title': "Cropped Example",
-                'crop': (-500,500, -500,500),
+                'crop': (-500, -500, 500, 500),
         }
-                    
 
 .. _customrendermodes:
 
diff --git a/overviewer_core/settingsValidators.py b/overviewer_core/settingsValidators.py
index 7cf7cf8..1344812 100644
--- a/overviewer_core/settingsValidators.py
+++ b/overviewer_core/settingsValidators.py
@@ -170,9 +170,9 @@ def validateCrop(value):
     if len(value) != 4:
         raise ValidationException("The value for the 'crop' setting must be a tuple of length 4")
     value = tuple(int(x) for x in value)
-    if value[0] >= value[1]:
+    if value[0] >= value[2]:
         raise ValidationException("About your crop numbers, the xmax value must be greater than the xmin value")
-    if value[2] >= value[3]:
+    if value[1] >= value[3]:
         raise ValidationException("About your crop numbers, the zmax value must be greater than the zmin value")
     return value
 
diff --git a/overviewer_core/world.py b/overviewer_core/world.py
index 51c5c6f..32bafea 100644
--- a/overviewer_core/world.py
+++ b/overviewer_core/world.py
@@ -517,7 +517,7 @@ class RotatedRegionSet(RegionSetWrapper):
             yield x,z,mtime
 
 class CroppedRegionSet(RegionSetWrapper):
-    def __init__(self, rsetobj, xmin, xmax, zmin, zmax):
+    def __init__(self, rsetobj, xmin, zmin, xmax, zmax):
         super(CroppedRegionSet, self).__init__(rsetobj)
         self.xmin = xmin//16
         self.xmax = xmax//16