FIX: explicitly list functions not allowed for spherical transforms.

atwilso · Dec 19, 2020 · c851bfa · c851bfa
1 parent 9f88664
commit c851bfa
Showing 1 changed file with 6 additions and 1 deletion.
diff --git a/lib/cartopy/mpl/geoaxes.py b/lib/cartopy/mpl/geoaxes.py
@@ -306,7 +306,12 @@ def wrapper(self, *args, **kwargs):
         transform = kwargs.get('transform', None)
         if transform is None:
             transform = self.projection
-        if (isinstance(transform, ccrs.CRS) and
+        # Raise an error if any of these functions try to use
+        # a spherical source CRS.
+        non_spherical_funcs = ['contour', 'contourf', 'pcolormesh', 'pcolor',
+                               'quiver', 'barbs', 'streamplot']
+        if (func.__name__ in non_spherical_funcs and
+                isinstance(transform, ccrs.CRS) and
                 not isinstance(transform, ccrs.Projection)):
             raise ValueError('Invalid transform: Spherical {} '
                              'is not supported - consider using '