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Update geoaxes.py pcolor to catch the ValueError #1476 #1479

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Update geoaxes.py pcolor to catch the ValueError #1476 #1479

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26 changes: 21 additions & 5 deletions lib/cartopy/mpl/geoaxes.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1757,13 +1757,29 @@ def pcolor(self, *args, **kwargs):
A :class:`~cartopy.crs.Projection`.

"""
result = matplotlib.axes.Axes.pcolor(self, *args, **kwargs)
# In some cases, a ValueError crashes the plot
# if there are other data already plotted by pcolormesh
# while the wrapping cells are plotted by pcolor,
# then the crash prevents the use of pcolormesh which could be
# an option to get around a pcolor crash.
# Managing the exception:
#
try:
result = matplotlib.axes.Axes.pcolor(self, *args, **kwargs)

# Update the datalim for this pcolor.
limits = result.get_datalim(self.transData)
self.update_datalim(limits)
# Update the datalim for this pcolor.
limits = result.get_datalim(self.transData)
self.update_datalim(limits)
self.autoscale_view()
except ValueError:
warnings.warn("Unexpected ValueError in pcolor"
" the pcolor plot artist is removed."
" Some cells could not be transformed"
" in the axis projection.")
for child in self.get_children():
if child is result:
child.remove()

self.autoscale_view()
return result

@_add_transform
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