make sure latmin,latmax are correct when some points are outside

projection limb.

Author: Jeff Whitaker

Changelog

@@ -1,5 +1,7 @@
 since version 1.0.6
 -------------------
+* fix drawmeridians so meridians reach edge of plot when map projection region
+  is *very* small (issue ???).
 * update pyproj (with fixes to geodesic calculations).
 * support for rotated pole transormation (projection = 'rotpole').
 * fix warpimage with projection = 'hammer' (issue 100).

lib/mpl_toolkits/basemap/__init__.py

@@ -1047,6 +1047,8 @@ def __init__(self, llcrnrlon=None, llcrnrlat=None,
             self.lonmax = self.urcrnrlon
         else:
             lons, lats = self.makegrid(1001,1001)
+            lats = ma.masked_where(lats > 1.e20,lats)
+            lons = ma.masked_where(lons > 1.e20,lons)
             self.latmin = lats.min()
             self.latmax = lats.max()
             self.lonmin = lons.min()