SF.net SVN: matplotlib: [5558] trunk/toolkits/basemap/lib/mpl_toolkits/ basemap/__init__.py

[<js...@us...>]

Revision: 5558
          http://matplotlib.svn.sourceforge.net/matplotlib/?rev=5558&view=rev
Author:   jswhit
Date:     2008-06-16 06:51:31 -0700 (Mon, 16 Jun 2008)

Log Message:
-----------
update comment on ortho/gnom boundary treatment

Modified Paths:
--------------
    trunk/toolkits/basemap/lib/mpl_toolkits/basemap/__init__.py

Modified: trunk/toolkits/basemap/lib/mpl_toolkits/basemap/__init__.py
===================================================================
--- trunk/toolkits/basemap/lib/mpl_toolkits/basemap/__init__.py	2008-06-16 13:41:14 UTC (rev 5557)
+++ trunk/toolkits/basemap/lib/mpl_toolkits/basemap/__init__.py	2008-06-16 13:51:31 UTC (rev 5558)
@@ -831,7 +831,9 @@
             raise ValueError('%s projection cannot cross pole'%(self.projection))
         # make sure orthographic or gnomonic projection has containsPole=True
         # we will compute the intersections in stereographic
-        # coordinates, then transform to orthographic.
+        # coordinates, then transform to orthographic. This is 
+        # because these projections are only defined on a hemisphere, and
+        # some boundary features (like Eurasia) would be undefined otherwise.
         if self.projection in ['ortho','gnom'] and name == 'gshhs':
             containsPole = True
             lon_0=self.projparams['lon_0']


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