Not sure if this is the right place to send this, can't seem to find a
dedicated bugs list or issue tracker. Or much discussion regarding the
basemap toolkit at all really.
Trying to savefig some Basemap instances causes the following
exception in the Cairo backend. Seems to work alright using the Agg
backend but the fill doesn't seem to come out properly. The sea gets
colored as well as the continents.
Traceback (most recent call last):
File "map.py", line 48, in <module>
plt.savefig("map.png", dpi=100)
File "/usr/lib/python2.5/site-packages/matplotlib/pyplot.py", line
286, in savefig
return fig.savefig(*args, **kwargs)
File "/usr/lib/python2.5/site-packages/matplotlib/figure.py", line
1033, in savefig
self.canvas.print_figure(*args, **kwargs)
File "/usr/lib/python2.5/site-packages/matplotlib/backend_bases.py",
line 1301, in print_figure
**kwargs)
File "/usr/lib/python2.5/site-packages/matplotlib/backends/backend_cairo.py",
line 406, in print_png
self.figure.draw (renderer)
File "/usr/lib/python2.5/site-packages/matplotlib/figure.py", line
833, in draw
for a in self.axes: a.draw(renderer)
File "/usr/lib/python2.5/site-packages/matplotlib/axes.py", line 1539, in draw
a.draw(renderer)
File "/usr/lib/python2.5/site-packages/matplotlib/patches.py", line
285, in draw
renderer.draw_path(gc, tpath, affine, rgbFace)
File "/usr/lib/python2.5/site-packages/matplotlib/backends/backend_cairo.py",
line 140, in draw_path
raise ValueError("The Cairo backend can not draw paths longer than
18980 points.")
ValueError: The Cairo backend can not draw paths longer than 18980 points.
Here's a short reduction
import matplotlib
matplotlib.use("Cairo")
from mpl_toolkits.basemap import Basemap
import matplotlib.pyplot as plt
map = Basemap(projection='ortho',
llcrnrlon=-12.7, llcrnrlat=49,
urcrnrlon=4.7, urcrnrlat=61,
lat_0 = 50, lon_0 = 0,
lat_ts=50,
resolution='i')
map.drawcoastlines(linewidth=0.5)
map.drawcountries(linewidth=0.5)
map.drawstates(linewidth=0.5)
map.drawmapboundary()
plt.savefig("map.png", dpi=100)
--
Alex Stapleton
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