/home/runner/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/cartopy/io/__init__.py:263: DownloadWarning: Downloading: https://naturalearth.s3.amazonaws.com/110m_cultural/ne_110m_admin_1_states_provinces_lakes.zip
  warnings.warn(f'Downloading: {url}', DownloadWarning)

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/core/dimension.py:1493, in Dimensioned._repr_mimebundle_(self, include, exclude)
   1486 def _repr_mimebundle_(self, include=None, exclude=None):
   1487     """Resolves the class hierarchy for the class rendering the
   1488     object using any display hooks registered on Store.display
   1489     hooks.  The output of all registered display_hooks is then
   1490     combined and returned.
   1491 
   1492     """
-> 1493     return Store.render(self)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/core/options.py:1519, in Store.render(cls, obj)
   1517 data, metadata = {}, {}
   1518 for hook in hooks:
-> 1519     ret = hook(obj)
   1520     if ret is None:
   1521         continue

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/ipython/display_hooks.py:330, in pprint_display(obj)
    328 if not ip.display_formatter.formatters["text/plain"].pprint:
    329     return None
--> 330 return display(obj, raw_output=True)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/ipython/display_hooks.py:298, in display(obj, raw_output, **kwargs)
    296 elif isinstance(obj, (CompositeOverlay, ViewableElement)):
    297     with option_state(obj):
--> 298         output = element_display(obj)
    299 elif isinstance(obj, (Layout, NdLayout, AdjointLayout)):
    300     with option_state(obj):

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/ipython/display_hooks.py:193, in display_hook.<locals>.wrapped(element)
    191 try:
    192     max_frames = OutputSettings.options["max_frames"]
--> 193     mimebundle = fn(element, max_frames=max_frames)
    194     if mimebundle is None:
    195         return {}, {}

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/ipython/display_hooks.py:231, in element_display(element, max_frames)
    228 if type(element) not in Store.registry[backend]:
    229     return None
--> 231 return render(element)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/ipython/display_hooks.py:62, in render(obj, **kwargs)
     59 if renderer.fig == "pdf":
     60     renderer = renderer.instance(fig="png")
---> 62 return renderer.components(obj, **kwargs)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/plotting/renderer.py:439, in Renderer.components(self, obj, fmt, comm, **kwargs)
    437     plot = obj
    438 else:
--> 439     plot, fmt = self._validate(obj, fmt)
    441 if not isinstance(plot, Viewable):
    442     html = self._figure_data(plot, fmt, as_script=True, **kwargs)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/plotting/renderer.py:370, in Renderer._validate(self, obj, fmt, **kwargs)
    368     plot = HoloViewsPane(obj, center=self.center, backend=self.backend, renderer=self)
    369 else:
--> 370     plot = self.get_plot(obj, renderer=self, **kwargs)
    372 all_formats = set(fig_formats + holomap_formats)
    373 if fmt not in all_formats:

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/plotting/renderer.py:300, in Renderer.get_plot(self_or_cls, obj, doc, renderer, comm, **kwargs)
    296     defaults = [kd.default for kd in plot.dimensions]
    297     init_key = tuple(
    298         v if d is None else d for v, d in zip(plot.keys[0], defaults, strict=None)
    299     )
--> 300     plot.update(init_key)
    301 else:
    302     plot = obj

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/plotting/mpl/plot.py:335, in MPLPlot.update(self, key)
    333 def update(self, key):
    334     if len(self) == 1 and key in (0, self.keys[0]) and not self.drawn:
--> 335         return self.initialize_plot()
    336     return self.__getitem__(key)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/plotting/mpl/plot.py:64, in mpl_rc_context.<locals>.wrapper(self, *args, **kwargs)
     62 def wrapper(self, *args, **kwargs):
     63     with _rc_context(self.fig_rcparams):
---> 64         return f(self, *args, **kwargs)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/plotting/mpl/element.py:1444, in OverlayPlot.initialize_plot(self, ranges)
   1442 ranges = self.compute_ranges(self.hmap, key, ranges)
   1443 for k, subplot in self.subplots.items():
-> 1444     subplot.initialize_plot(ranges=ranges)
   1445     if isinstance(element, CompositeOverlay):
   1446         frame = element.get(k, None)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/plotting/mpl/plot.py:64, in mpl_rc_context.<locals>.wrapper(self, *args, **kwargs)
     62 def wrapper(self, *args, **kwargs):
     63     with _rc_context(self.fig_rcparams):
---> 64         return f(self, *args, **kwargs)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/plotting/mpl/element.py:685, in ElementPlot.initialize_plot(self, ranges)
    683 if self.show_legend:
    684     style["label"] = element.label
--> 685 handles, axis_kwargs = self.render_artists(element, ranges, style, ax)
    686 self.handles.update(handles)
    688 trigger = self._trigger

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/plotting/mpl/element.py:656, in ElementPlot.render_artists(self, element, ranges, style, ax)
    655 def render_artists(self, element, ranges, style, ax):
--> 656     plot_data, plot_kwargs, axis_kwargs = self.get_data(element, ranges, style)
    657     legend = plot_kwargs.pop("cat_legend", None)
    658     with abbreviated_exception():

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/geoviews/plotting/mpl/__init__.py:237, in GeoPlot.get_data(self, element, ranges, style)
    235 def get_data(self, element, ranges, style):
    236     if self._project_operation and self.geographic:
--> 237         element = self._project_operation(element, projection=self.projection)
    238     return super().get_data(element, ranges, style)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/param/parameterized.py:6426, in ParameterizedFunction.__new__(class_, *args, **params)
   6424 inst = class_.instance()
   6425 inst.param._set_name(class_.__name__)
-> 6426 return inst.__call__(*args, **params)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/core/operation.py:236, in Operation.__call__(self, element, **kwargs)
    234 kwargs["link_dataset"] = self._propagate_dataset
    235 kwargs["link_inputs"] = self.p.link_inputs
--> 236 return element.apply(self, **kwargs)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/core/accessors.py:47, in AccessorPipelineMeta.pipelined.<locals>.pipelined_call(*args, **kwargs)
     44     inst._obj._in_method = True
     46 try:
---> 47     result = __call__(*args, **kwargs)
     49     if not in_method:
     50         init_op = factory.instance(
     51             output_type=type(inst),
     52             kwargs={"mode": getattr(inst, "mode", None)},
     53         )

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/core/accessors.py:228, in Apply.__call__(self, apply_function, streams, link_inputs, link_dataset, dynamic, per_element, **kwargs)
    226 if hasattr(apply_function, "dynamic"):
    227     inner_kwargs["dynamic"] = False
--> 228 new_obj = apply_function(self._obj, **inner_kwargs)
    229 if (
    230     link_dataset
    231     and isinstance(self._obj, Dataset)
    232     and isinstance(new_obj, Dataset)
    233     and new_obj._dataset is None
    234 ):
    235     new_obj._dataset = self._obj.dataset

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/core/operation.py:230, in Operation.__call__(self, element, **kwargs)
    226         return element.clone([(k, self._apply(el, key=k)) for k, el in element.items()])
    227     elif (self._per_element and isinstance(element, Element)) or (
    228         not self._per_element and isinstance(element, ViewableElement)
    229     ):
--> 230         return self._apply(element)
    231 elif "streams" not in kwargs:
    232     kwargs["streams"] = self.p.streams

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/core/operation.py:156, in Operation._apply(self, element, key)
    154     if not in_method:
    155         element._in_method = True
--> 156 ret = self._process(element, key)
    157 if hasattr(element, "_in_method") and not in_method:
    158     element._in_method = in_method

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/geoviews/operation/projection.py:72, in _project_operation._process(self, element, key)
     71 def _process(self, element, key=None):
---> 72     return element.map(self._process_element, self.supported_types)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/core/data/__init__.py:234, in PipelineMeta.pipelined.<locals>.pipelined_fn(*args, **kwargs)
    231     inst._in_method = True
    233 try:
--> 234     result = method_fn(*args, **kwargs)
    236     op = method_op.instance(
    237         input_type=type(inst),
    238         method_name=method_name,
    239         args=list(args[1:]),
    240         kwargs=kwargs,
    241     )
    243     if not in_method:

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/core/data/__init__.py:1349, in Dataset.map(self, *args, **kwargs)
   1347 @wraps(LabelledData.map)
   1348 def map(self, *args, **kwargs):
-> 1349     return super().map(*args, **kwargs)

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/holoviews/core/dimension.py:846, in LabelledData.map(self, map_fn, specs, clone)
    844     return deep_mapped
    845 else:
--> 846     return map_fn(self) if applies else self

File ~/micromamba/envs/unstructured-grid-viz-cookbook-dev/lib/python3.14/site-packages/geoviews/operation/projection.py:89, in project_path._process_element(self, element)
     86 crs = element.crs
     87 proj = self.p.projection
     88 if (isinstance(crs, ccrs.PlateCarree) and not isinstance(proj, ccrs.PlateCarree)
---> 89     and crs.proj4_params['lon_0'] != 0):
     90     element = self.instance(projection=ccrs.PlateCarree())(element)
     92 if isinstance(proj, ccrs.CRS) and not isinstance(proj, ccrs.Projection):

KeyError: 'lon_0'