Revision: 4109
http://matplotlib.svn.sourceforge.net/matplotlib/?rev=4109&view=rev
Author: jswhit
Date: 2007-11-05 08:50:11 -0800 (Mon, 05 Nov 2007)
Log Message:
-----------
fix for coastline segments that jump across plot.
Modified Paths:
--------------
trunk/toolkits/basemap-testing/lib/matplotlib/toolkits/basemap/basemap.py
Modified:
trunk/toolkits/basemap-testing/lib/matplotlib/toolkits/basemap/basemap.py
===================================================================
--- trunk/toolkits/basemap-testing/lib/matplotlib/toolkits/basemap/basemap.py
2007-11-05 16:11:12 UTC (rev 4108)
+++ trunk/toolkits/basemap-testing/lib/matplotlib/toolkits/basemap/basemap.py
2007-11-05 16:50:11 UTC (rev 4109)
@@ -682,9 +682,27 @@
# reformat for use in matplotlib.patches.Polygon.
self.coastpolygons = []
for xy in self.coastsegs:
- x = [x1 for x1,x2 in xy]
- y = [x2 for x1,x2 in xy]
+ x, y = zip(*xy)
self.coastpolygons.append((x,y))
+ # split coastline segments that jump across entire plot.
+ coastsegs = []
+ for seg in self.coastsegs:
+ x, y = zip(*seg)
+ x = npy.array(x,npy.float64); y = npy.array(y,npy.float64)
+ xd = (x[1:]-x[0:-1])**2
+ yd = (y[1:]-y[0:-1])**2
+ dist = npy.sqrt(xd+yd)
+ split = dist > 5000000.
+ if npy.sum(split) and self.projection not in
['merc','cyl','mill']:
+ ind =
(npy.compress(split,squeeze(split*npy.indices(xd.shape)))+1).tolist()
+ iprev = 0
+ ind.append(len(xd))
+ for i in ind:
+ coastsegs.append(zip(x[iprev:i],y[iprev:i]))
+ iprev = i
+ else:
+ coastsegs.append(seg)
+ self.coastsegs = coastsegs
def __call__(self,x,y,inverse=False):
"""
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