GeoPandas GeoDataFrame.hvplot dies

[scott-vsi]

ALL software version info

Software Version Info

Ubuntu 22.04

SYSTEM INFO
-----------
python     : 3.10.12 (main, Nov 20 2023, 15:14:05) [GCC 11.4.0]
executable : /venv/bin/python3
machine    : Linux-6.8.10-200.fc39.x86_64-x86_64-with-glibc2.35

PYTHON DEPENDENCIES
-------------------
bokeh                     3.7.3
geopandas                 1.1.0
geopy                     2.4.1
holoviews                 1.20.2
hvplot                    0.11.3
numpy                     1.26.3
pandas                    2.2.3
pyproj                    3.7.1
shapely                   2.1.1

Description of expected behavior and the observed behavior

I am plotting GeoPandas DataFrames composed of shapely Points and Lines on a map. If I plot 25 tracks, it will render, but if I plot 26 it throws a ValueError: not enough values to unpack (expected 2, got 1) exception (although I assume this is just where it dies, and the issue is actually elsewhere)

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

import numpy as np
import matplotlib.pyplot as plt
from datetime import datetime, timedelta
import pandas as pd
import geopandas as gpd
from holoviews import Overlay
from shapely import LineString
import hvplot.pandas

num_tracks = 26 # TODO change to 25 and this works
points_per_track = 10
total_duration_minutes = 60

data = []
for track_id in range(num_tracks):
    # Define a random starting point and a smoother trajectory path
    # RE if points fall outside of -85 - 85, the projetion fails
    x_start = np.random.uniform(0, 70)
    y_start = np.random.uniform(0, 70)

    # Generate coordinates with some random variation for a more "realistic" track
    x_coords = x_start + np.cumsum(np.random.normal(0, 2, points_per_track))
    y_coords = y_start + np.cumsum(np.random.normal(0, 2, points_per_track))
    x_coords, y_coords = np.clip(x_coords, 0, 85), np.clip(y_coords, 0, 85)

    # Generate timestamps
    start_time = pd.Timestamp.now() + timedelta(days=track_id)
    time_series = [start_time + timedelta(minutes=i) for i in range(points_per_track)]
    
    df = pd.DataFrame({'line_id': track_id+3, 'DateTime': time_series, 'Longitude': x_coords, 'Latitude': y_coords})
    data.append(df)

df = pd.concat(data)
gdf = gpd.GeoDataFrame(df, geometry=gpd.points_from_xy(df.Longitude, df.Latitude), crs='EPSG:4326')

lines_gdf = pd.concat([gpd.GeoDataFrame(
        {'line_id': line_id}, index=[i], geometry=[LineString(gdf[gdf['line_id'] == line_id]['geometry'].tolist())])
    for i,line_id in enumerate(gdf['line_id'].unique())])

(
    lines_gdf.hvplot(by='line_id', geo=True, tiles='CartoLight') * 
    gdf.hvplot(by='line_id', marker='triangle', geo=True)
).opts(frame_width=700, frame_height=700)

Stack traceback and/or browser JavaScript console output

stack trace

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
File /venv/lib/python3.10/site-packages/IPython/core/formatters.py:974, in MimeBundleFormatter.__call__(self, obj, include, exclude)
    971     method = get_real_method(obj, self.print_method)
    973     if method is not None:
--> 974         return method(include=include, exclude=exclude)
    975     return None
    976 else:

File /venv/lib/python3.10/site-packages/holoviews/core/dimension.py:1277, in Dimensioned._repr_mimebundle_(self, include, exclude)
   1270 def _repr_mimebundle_(self, include=None, exclude=None):
   1271     """
   1272     Resolves the class hierarchy for the class rendering the
   1273     object using any display hooks registered on Store.display
   1274     hooks.  The output of all registered display_hooks is then
   1275     combined and returned.
   1276     """
-> 1277     return Store.render(self)

File /venv/lib/python3.10/site-packages/holoviews/core/options.py:1423, in Store.render(cls, obj)
   1421 data, metadata = {}, {}
   1422 for hook in hooks:
-> 1423     ret = hook(obj)
   1424     if ret is None:
   1425         continue

File /venv/lib/python3.10/site-packages/holoviews/ipython/display_hooks.py:287, in pprint_display(obj)
    285 if not ip.display_formatter.formatters['text/plain'].pprint:
    286     return None
--> 287 return display(obj, raw_output=True)

File /venv/lib/python3.10/site-packages/holoviews/ipython/display_hooks.py:255, in display(obj, raw_output, **kwargs)
    253 elif isinstance(obj, (CompositeOverlay, ViewableElement)):
    254     with option_state(obj):
--> 255         output = element_display(obj)
    256 elif isinstance(obj, (Layout, NdLayout, AdjointLayout)):
    257     with option_state(obj):

File /venv/lib/python3.10/site-packages/holoviews/ipython/display_hooks.py:149, in display_hook.<locals>.wrapped(element)
    147 try:
    148     max_frames = OutputSettings.options['max_frames']
--> 149     mimebundle = fn(element, max_frames=max_frames)
    150     if mimebundle is None:
    151         return {}, {}

File /venv/lib/python3.10/site-packages/holoviews/ipython/display_hooks.py:195, in element_display(element, max_frames)
    192 if type(element) not in Store.registry[backend]:
    193     return None
--> 195 return render(element)

File /venv/lib/python3.10/site-packages/holoviews/ipython/display_hooks.py:76, in render(obj, **kwargs)
     73 if renderer.fig == 'pdf':
     74     renderer = renderer.instance(fig='png')
---> 76 return renderer.components(obj, **kwargs)

File /venv/lib/python3.10/site-packages/holoviews/plotting/renderer.py:396, in Renderer.components(self, obj, fmt, comm, **kwargs)
    394 embed = (not (dynamic or streams or self.widget_mode == 'live') or config.embed)
    395 if embed or config.comms == 'default':
--> 396     return self._render_panel(plot, embed, comm)
    397 return self._render_ipywidget(plot)

File /venv/lib/python3.10/site-packages/holoviews/plotting/renderer.py:403, in Renderer._render_panel(self, plot, embed, comm)
    401 doc = Document()
    402 with config.set(embed=embed):
--> 403     model = plot.layout._render_model(doc, comm)
    404 if embed:
    405     return render_model(model, comm)

File /venv/lib/python3.10/site-packages/panel/viewable.py:768, in Viewable._render_model(self, doc, comm)
    766 if comm is None:
    767     comm = state._comm_manager.get_server_comm()
--> 768 model = self.get_root(doc, comm)
    770 if self._design and self._design.theme.bokeh_theme:
    771     doc.theme = self._design.theme.bokeh_theme

File /venv/lib/python3.10/site-packages/panel/layout/base.py:329, in Panel.get_root(self, doc, comm, preprocess)
    325 def get_root(
    326     self, doc: Document | None = None, comm: Comm | None = None,
    327     preprocess: bool = True
    328 ) -> Model:
--> 329     root = super().get_root(doc, comm, preprocess)
    330     # ALERT: Find a better way to handle this
    331     if hasattr(root, 'styles') and 'overflow-x' in root.styles:

File /venv/lib/python3.10/site-packages/panel/viewable.py:698, in Renderable.get_root(self, doc, comm, preprocess)
    696 wrapper = self._design._wrapper(self)
    697 if wrapper is self:
--> 698     root = self._get_model(doc, comm=comm)
    699     if preprocess:
    700         self._preprocess(root)

File /venv/lib/python3.10/site-packages/panel/layout/base.py:313, in Panel._get_model(self, doc, root, parent, comm)
    311 root = root or model
    312 self._models[root.ref['id']] = (model, parent)
--> 313 objects, _ = self._get_objects(model, [], doc, root, comm)
    314 props = self._get_properties(doc)
    315 props[self._property_mapping['objects']] = objects

File /venv/lib/python3.10/site-packages/panel/layout/base.py:295, in Panel._get_objects(self, model, old_objects, doc, root, comm)
    293 else:
    294     try:
--> 295         child = pane._get_model(doc, root, model, comm)
    296     except RerenderError as e:
    297         if e.layout is not None and e.layout is not self:

File /venv/lib/python3.10/site-packages/panel/pane/holoviews.py:437, in HoloViews._get_model(self, doc, root, parent, comm)
    435     plot = self.object
    436 else:
--> 437     plot = self._render(doc, comm, root)
    439 plot.pane = self
    440 backend = plot.renderer.backend

File /venv/lib/python3.10/site-packages/panel/pane/holoviews.py:531, in HoloViews._render(self, doc, comm, root)
    528     if comm:
    529         kwargs['comm'] = comm
--> 531 return renderer.get_plot(self.object, **kwargs)

File /venv/lib/python3.10/site-packages/holoviews/plotting/bokeh/renderer.py:68, in BokehRenderer.get_plot(self_or_cls, obj, doc, renderer, **kwargs)
     61 @bothmethod
     62 def get_plot(self_or_cls, obj, doc=None, renderer=None, **kwargs):
     63     """
     64     Given a HoloViews Viewable return a corresponding plot instance.
     65     Allows supplying a document attach the plot to, useful when
     66     combining the bokeh model with another plot.
     67     """
---> 68     plot = super().get_plot(obj, doc, renderer, **kwargs)
     69     if plot.document is None:
     70         plot.document = Document() if self_or_cls.notebook_context else curdoc()

File /venv/lib/python3.10/site-packages/holoviews/plotting/renderer.py:239, in Renderer.get_plot(self_or_cls, obj, doc, renderer, comm, **kwargs)
    236     defaults = [kd.default for kd in plot.dimensions]
    237     init_key = tuple(v if d is None else d for v, d in
    238                      zip(plot.keys[0], defaults))
--> 239     plot.update(init_key)
    240 else:
    241     plot = obj

File /venv/lib/python3.10/site-packages/holoviews/plotting/plot.py:956, in DimensionedPlot.update(self, key)
    954 def update(self, key):
    955     if len(self) == 1 and key in (0, self.keys[0]) and not self.drawn:
--> 956         return self.initialize_plot()
    957     item = self.__getitem__(key)
    958     self.traverse(lambda x: setattr(x, '_updated', True))

File /venv/lib/python3.10/site-packages/geoviews/plotting/bokeh/plot.py:125, in GeoPlot.initialize_plot(self, ranges, plot, plots, source)
    123 def initialize_plot(self, ranges=None, plot=None, plots=None, source=None):
    124     opts = {} if isinstance(self, HvOverlayPlot) else {'source': source}
--> 125     fig = super().initialize_plot(ranges, plot, plots, **opts)
    126     style_element = self.current_frame.last if self.batched else self.current_frame
    127     el_ranges = match_spec(style_element, self.current_ranges) if self.current_ranges else {}

File /venv/lib/python3.10/site-packages/holoviews/plotting/bokeh/element.py:3438, in OverlayPlot.initialize_plot(self, ranges, plot, plots)
   3436 if self.tabs:
   3437     subplot.overlaid = False
-> 3438 child = subplot.initialize_plot(ranges, plot, plots)
   3439 if isinstance(element, CompositeOverlay):
   3440     # Ensure that all subplots are in the same state
   3441     frame = element.get(key, None)

File /venv/lib/python3.10/site-packages/geoviews/plotting/bokeh/plot.py:125, in GeoPlot.initialize_plot(self, ranges, plot, plots, source)
    123 def initialize_plot(self, ranges=None, plot=None, plots=None, source=None):
    124     opts = {} if isinstance(self, HvOverlayPlot) else {'source': source}
--> 125     fig = super().initialize_plot(ranges, plot, plots, **opts)
    126     style_element = self.current_frame.last if self.batched else self.current_frame
    127     el_ranges = match_spec(style_element, self.current_ranges) if self.current_ranges else {}

File /venv/lib/python3.10/site-packages/holoviews/plotting/bokeh/element.py:3438, in OverlayPlot.initialize_plot(self, ranges, plot, plots)
   3436 if self.tabs:
   3437     subplot.overlaid = False
-> 3438 child = subplot.initialize_plot(ranges, plot, plots)
   3439 if isinstance(element, CompositeOverlay):
   3440     # Ensure that all subplots are in the same state
   3441     frame = element.get(key, None)

File /venv/lib/python3.10/site-packages/geoviews/plotting/bokeh/plot.py:125, in GeoPlot.initialize_plot(self, ranges, plot, plots, source)
    123 def initialize_plot(self, ranges=None, plot=None, plots=None, source=None):
    124     opts = {} if isinstance(self, HvOverlayPlot) else {'source': source}
--> 125     fig = super().initialize_plot(ranges, plot, plots, **opts)
    126     style_element = self.current_frame.last if self.batched else self.current_frame
    127     el_ranges = match_spec(style_element, self.current_ranges) if self.current_ranges else {}

File /venv/lib/python3.10/site-packages/holoviews/plotting/bokeh/element.py:2194, in ElementPlot.initialize_plot(self, ranges, plot, plots, source)
   2192 if self.autorange:
   2193     self._setup_autorange()
-> 2194 self._init_glyphs(plot, element, ranges, source)
   2195 if not self.overlaid:
   2196     self._update_plot(key, plot, style_element)

File /venv/lib/python3.10/site-packages/holoviews/plotting/bokeh/element.py:2116, in ElementPlot._init_glyphs(self, plot, element, ranges, source)
   2113 if isinstance(renderer, Renderer):
   2114     self.handles['glyph_renderer'] = renderer
-> 2116 self._postprocess_hover(renderer, source)
   2118 if self.scalebar:
   2119     self._draw_scalebar(plot=plot, renderer=renderer)

File /venv/lib/python3.10/site-packages/geoviews/plotting/bokeh/plot.py:153, in GeoPlot._postprocess_hover(self, renderer, source)
    151     return
    152 element = self.current_frame
--> 153 xdim, ydim = (dimension_sanitizer(kd.name) for kd in element.kdims)
    154 formatters, tooltips = dict(hover.formatters), []
    155 xhover = CustomJSHover(code=self._hover_code % 0)

ValueError: not enough values to unpack (expected 2, got 1)

:Overlay
   .WMTS.I       :WMTS   [Longitude,Latitude]
   .NdOverlay.I  :NdOverlay   [MMSI]
      :Path   [Longitude,Latitude]
   .NdOverlay.II :NdOverlay   [MMSI]
      :Points   [Longitude,Latitude]

#### Screenshots or screencasts of the bug in action

• I may be interested in making a pull request to address this

[scott-vsi]

If I change

(
    lines_gdf.hvplot(by='line_id', geo=True, tiles='CartoLight') * 
    gdf.hvplot(by='line_id', marker='triangle', geo=True)
).opts(frame_width=700, frame_height=700)

to

(
    lines_gdf.hvplot(by='line_id', geo=True, tiles='CartoLight') * 
    gdf.hvplot(by='line_id', marker='triangle', geo=True, hover=False)
).opts(frame_width=700, frame_height=700)

then it works