gv.Polygons (default)PlateCarree IndexError

[DmitriyLeybel]

ALL software version info

python == 3.9.13

geoviews == 1.9.5 holoviews == 1.14.8 shapely == 1.8.2 cartopy == 0.20.3 bokeh == 2.4.2 matplotlib == 3.5.1

Description of expected behavior and the observed behavior

In attempting to plot a geometry from a shape file from the census.gov repo, I'm experiencing errors when using the default crs argument(Plate Carree) of gv.Polygons. The same error persists when assigning Plate Carree as the crs to use with hvplot, when changing the plotting backend from bokeh to matplotlib, and when changing the crs with geopandas(to_crs). Other crs projections do appear to work when set in the plotting function, such as Mercator, GOOGLE_MERCATOR, and EckertII, and default hvplot method.

Complete, minimal, self-contained example code that reproduces the issue

From Notebook:

import geopandas as gpd
import geoviews as gv
from cartopy import crs

gv.extension('bokeh')

t = gpd.read_file('test_geo.json')

gv.Polygons(t) #Index Error 
# t.hvplot(crs=crs.PlateCarree()) #Another Index Error

# gv.Polygons(t, crs=crs.Mercator()) # Works
# t.hvplot() # Works

IndexError

IndexError                                Traceback (most recent call last)
File ~\.conda\envs\geo\lib\site-packages\IPython\core\formatters.py:973, in MimeBundleFormatter.__call__(self, obj, include, exclude)
    970     method = get_real_method(obj, self.print_method)
    972     if method is not None:
--> 973         return method(include=include, exclude=exclude)
    974     return None
    975 else:

File ~\.conda\envs\geo\lib\site-packages\holoviews\core\dimension.py:1316, in Dimensioned._repr_mimebundle_(self, include, exclude)
   1309 def _repr_mimebundle_(self, include=None, exclude=None):
   1310     """
   1311     Resolves the class hierarchy for the class rendering the
   1312     object using any display hooks registered on Store.display
   1313     hooks.  The output of all registered display_hooks is then
   1314     combined and returned.
   1315     """
-> 1316     return Store.render(self)

File ~\.conda\envs\geo\lib\site-packages\holoviews\core\options.py:1405, in Store.render(cls, obj)
   1403 data, metadata = {}, {}
   1404 for hook in hooks:
-> 1405     ret = hook(obj)
   1406     if ret is None:
   1407         continue

File ~\.conda\envs\geo\lib\site-packages\holoviews\ipython\display_hooks.py:282, in pprint_display(obj)
    280 if not ip.display_formatter.formatters['text/plain'].pprint:
    281     return None
--> 282 return display(obj, raw_output=True)

File ~\.conda\envs\geo\lib\site-packages\holoviews\ipython\display_hooks.py:252, in display(obj, raw_output, **kwargs)
    250 elif isinstance(obj, (CompositeOverlay, ViewableElement)):
    251     with option_state(obj):
--> 252         output = element_display(obj)
    253 elif isinstance(obj, (Layout, NdLayout, AdjointLayout)):
    254     with option_state(obj):

File ~\.conda\envs\geo\lib\site-packages\holoviews\ipython\display_hooks.py:146, in display_hook.<locals>.wrapped(element)
    144 try:
    145     max_frames = OutputSettings.options['max_frames']
--> 146     mimebundle = fn(element, max_frames=max_frames)
    147     if mimebundle is None:
    148         return {}, {}

File ~\.conda\envs\geo\lib\site-packages\holoviews\ipython\display_hooks.py:192, in element_display(element, max_frames)
    189 if type(element) not in Store.registry[backend]:
    190     return None
--> 192 return render(element)

File ~\.conda\envs\geo\lib\site-packages\holoviews\ipython\display_hooks.py:68, in render(obj, **kwargs)
     65 if renderer.fig == 'pdf':
     66     renderer = renderer.instance(fig='png')
---> 68 return renderer.components(obj, **kwargs)

File ~\.conda\envs\geo\lib\site-packages\holoviews\plotting\renderer.py:410, in Renderer.components(self, obj, fmt, comm, **kwargs)
    408 doc = Document()
    409 with config.set(embed=embed):
--> 410     model = plot.layout._render_model(doc, comm)
    411 if embed:
    412     return render_model(model, comm)

File ~\.conda\envs\geo\lib\site-packages\panel\viewable.py:460, in Renderable._render_model(self, doc, comm)
    458 if comm is None:
    459     comm = state._comm_manager.get_server_comm()
--> 460 model = self.get_root(doc, comm)
    462 if config.embed:
    463     embed_state(self, model, doc,
    464                 json=config.embed_json,
    465                 json_prefix=config.embed_json_prefix,
    466                 save_path=config.embed_save_path,
    467                 load_path=config.embed_load_path,
    468                 progress=False)

File ~\.conda\envs\geo\lib\site-packages\panel\viewable.py:518, in Renderable.get_root(self, doc, comm, preprocess)
    501 """
    502 Returns the root model and applies pre-processing hooks
    503 
   (...)
    515 Returns the bokeh model corresponding to this panel object
    516 """
    517 doc = init_doc(doc)
--> 518 root = self._get_model(doc, comm=comm)
    519 if preprocess:
    520     self._preprocess(root)

File ~\.conda\envs\geo\lib\site-packages\panel\layout\base.py:122, in Panel._get_model(self, doc, root, parent, comm)
    120 if root is None:
    121     root = model
--> 122 objects = self._get_objects(model, [], doc, root, comm)
    123 props = dict(self._init_params(), objects=objects)
    124 model.update(**self._process_param_change(props))

File ~\.conda\envs\geo\lib\site-packages\panel\layout\base.py:112, in Panel._get_objects(self, model, old_objects, doc, root, comm)
    110 else:
    111     try:
--> 112         child = pane._get_model(doc, root, model, comm)
    113     except RerenderError:
    114         return self._get_objects(model, current_objects[:i], doc, root, comm)

File ~\.conda\envs\geo\lib\site-packages\panel\pane\holoviews.py:248, in HoloViews._get_model(self, doc, root, parent, comm)
    246     plot = self.object
    247 else:
--> 248     plot = self._render(doc, comm, root)
    250 plot.pane = self
    251 backend = plot.renderer.backend

File ~\.conda\envs\geo\lib\site-packages\panel\pane\holoviews.py:321, in HoloViews._render(self, doc, comm, root)
    318     if comm:
    319         kwargs['comm'] = comm
--> 321 return renderer.get_plot(self.object, **kwargs)

File ~\.conda\envs\geo\lib\site-packages\holoviews\plotting\bokeh\renderer.py:73, in BokehRenderer.get_plot(self_or_cls, obj, doc, renderer, **kwargs)
     66 @bothmethod
     67 def get_plot(self_or_cls, obj, doc=None, renderer=None, **kwargs):
     68     """
     69     Given a HoloViews Viewable return a corresponding plot instance.
     70     Allows supplying a document attach the plot to, useful when
     71     combining the bokeh model with another plot.
     72     """
---> 73     plot = super(BokehRenderer, self_or_cls).get_plot(obj, doc, renderer, **kwargs)
     74     if plot.document is None:
     75         plot.document = Document() if self_or_cls.notebook_context else curdoc()

File ~\.conda\envs\geo\lib\site-packages\holoviews\plotting\renderer.py:243, in Renderer.get_plot(self_or_cls, obj, doc, renderer, comm, **kwargs)
    240     defaults = [kd.default for kd in plot.dimensions]
    241     init_key = tuple(v if d is None else d for v, d in
    242                      zip(plot.keys[0], defaults))
--> 243     plot.update(init_key)
    244 else:
    245     plot = obj

File ~\.conda\envs\geo\lib\site-packages\holoviews\plotting\plot.py:991, in DimensionedPlot.update(self, key)
    989 def update(self, key):
    990     if len(self) == 1 and ((key == 0) or (key == self.keys[0])) and not self.drawn:
--> 991         return self.initialize_plot()
    992     item = self.__getitem__(key)
    993     self.traverse(lambda x: setattr(x, '_updated', True))

File ~\.conda\envs\geo\lib\site-packages\geoviews\plotting\bokeh\plot.py:111, in GeoPlot.initialize_plot(self, ranges, plot, plots, source)
    109 def initialize_plot(self, ranges=None, plot=None, plots=None, source=None):
    110     opts = {} if isinstance(self, HvOverlayPlot) else {'source': source}
--> 111     fig = super(GeoPlot, self).initialize_plot(ranges, plot, plots, **opts)
    112     if self.geographic and self.show_bounds and not self.overlaid:
    113         from . import GeoShapePlot

File ~\.conda\envs\geo\lib\site-packages\holoviews\plotting\bokeh\element.py:1409, in ElementPlot.initialize_plot(self, ranges, plot, plots, source)
   1407 # Initialize plot, source and glyph
   1408 if plot is None:
-> 1409     plot = self._init_plot(key, style_element, ranges=ranges, plots=plots)
   1410     self._init_axes(plot)
   1411 else:

File ~\.conda\envs\geo\lib\site-packages\holoviews\plotting\bokeh\element.py:496, in ElementPlot._init_plot(self, key, element, plots, ranges)
    489 """
    490 Initializes Bokeh figure to draw Element into and sets basic
    491 figure and axis attributes including axes types, labels,
    492 titles and plot height and width.
    493 """
    494 subplots = list(self.subplots.values()) if self.subplots else []
--> 496 axis_types, labels, plot_ranges = self._axes_props(plots, subplots, element, ranges)
    497 xlabel, ylabel, _ = labels
    498 x_axis_type, y_axis_type = axis_types

File ~\.conda\envs\geo\lib\site-packages\holoviews\plotting\bokeh\element.py:407, in ElementPlot._axes_props(self, plots, subplots, element, ranges)
    405 # Get the Element that determines the range and get_extents
    406 range_el = el if self.batched and not isinstance(self, OverlayPlot) else element
--> 407 l, b, r, t = self.get_extents(range_el, ranges)
    408 if self.invert_axes:
    409     l, b, r, t = b, l, t, r

File ~\.conda\envs\geo\lib\site-packages\geoviews\plotting\plot.py:73, in ProjectionPlot.get_extents(self, element, ranges, range_type)
     71     extents = None
     72 else:
---> 73     extents = project_extents(extents, element.crs, proj)
     74 return (np.NaN,)*4 if not extents else extents

File ~\.conda\envs\geo\lib\site-packages\geoviews\util.py:102, in project_extents(extents, src_proj, dest_proj, tol)
    100     geom_in_src_proj = geom_clipped_to_dest_proj
    101 try:
--> 102     geom_in_crs = dest_proj.project_geometry(geom_in_src_proj, src_proj)
    103 except ValueError:
    104     src_name =type(src_proj).__name__

File ~\.conda\envs\geo\lib\site-packages\cartopy\crs.py:805, in Projection.project_geometry(self, geometry, src_crs)
    803 if not method_name:
    804     raise ValueError(f'Unsupported geometry type {geom_type!r}')
--> 805 return getattr(self, method_name)(geometry, src_crs)

File ~\.conda\envs\geo\lib\site-packages\cartopy\crs.py:941, in Projection._project_polygon(self, polygon, src_crs)
    939     is_ccw = True
    940 else:
--> 941     is_ccw = polygon.exterior.is_ccw
    942 # Project the polygon exterior/interior rings.
    943 # Each source ring will result in either a ring, or one or more
    944 # lines.
    945 rings = []

File ~\.conda\envs\geo\lib\site-packages\shapely\geometry\polygon.py:99, in LinearRing.is_ccw(self)
     96 @property
     97 def is_ccw(self):
     98     """True is the ring is oriented counter clock-wise"""
---> 99     return bool(self.impl['is_ccw'](self))

File ~\.conda\envs\geo\lib\site-packages\shapely\algorithms\cga.py:14, in is_ccw_impl.<locals>.is_ccw_op(ring)
     13 def is_ccw_op(ring):
---> 14     return signed_area(ring) >= 0.0

File ~\.conda\envs\geo\lib\site-packages\shapely\algorithms\cga.py:7, in signed_area(ring)
      3 """Return the signed area enclosed by a ring in linear time using the
      4 algorithm at: https://web.archive.org/web/20080209143651/http://cgafaq.info:80/wiki/Polygon_Area
      5 """
      6 xs, ys = ring.coords.xy
----> 7 xs.append(xs[1])
      8 ys.append(ys[1])
      9 return sum(xs[i]*(ys[i+1]-ys[i-1]) for i in range(1, len(ring.coords)))/2.0

IndexError: array index out of range
:Polygons   [Longitude,Latitude]   (id,name)

test_geo.zip

gv.Polygons with Mercator crs:

[hoxbro]

gv.Polygons defaults to PlateCarree, which is why both of those examples give an IndexError. hvplot without any inputs works because it only outputs an Holoviews plot. If you set geo=True it will also give an IndexError.

I think you get an IndexError because your data is projected coordinates with a geographic coordinates system.

Your solution of setting crs looks fine to me. Alternative, you can change the CRS of the GeoDataFrame with t = t.set_crs("EPSG:3857", allow_override=True).to_crs("EPSG:4326") (not sure if those are the correct CRS).

When #581 is merged, the error will be better.