Plot boundaries slightly outside of default frame with projections and "bokeh" backend

philipc2 commented 1 month ago

ALL software version info

(this library, plus any other relevant software, e.g. bokeh, python, notebook, OS, browser, etc should be added within the dropdown below.)

Software Version Info

```plaintext # Name Version Build Channel abseil-cpp 20211102.0 h6b3803e_1 conda-forge accessible-pygments 0.0.5 pypi_0 pypi alabaster 1.0.0 pypi_0 pypi antimeridian 0.3.8 pyhd8ed1ab_0 conda-forge anyio 4.2.0 py311hca03da5_0 anywidget 0.9.13 pyhd8ed1ab_0 conda-forge appnope 0.1.2 py311hca03da5_1001 archspec 0.2.3 pyhd3eb1b0_0 argon2-cffi 21.3.0 pyhd3eb1b0_0 argon2-cffi-bindings 21.2.0 py311h80987f9_0 arrow 1.3.0 pypi_0 pypi arrow-cpp 14.0.2 hc7aafb3_1 asttokens 2.0.5 pyhd3eb1b0_0 asv 0.6.4.dev13+gee3b187 pypi_0 pypi asv-runner 0.2.1 pypi_0 pypi async-lru 2.0.4 py311hca03da5_0 attrs 23.1.0 py311hca03da5_0 aws-c-auth 0.6.19 h80987f9_0 aws-c-cal 0.5.20 h80987f9_0 aws-c-common 0.8.5 h80987f9_0 aws-c-compression 0.2.16 h80987f9_0 aws-c-event-stream 0.2.15 h313beb8_0 aws-c-http 0.6.25 h80987f9_0 aws-c-io 0.13.10 h80987f9_0 aws-c-mqtt 0.7.13 h80987f9_0 aws-c-s3 0.1.51 h80987f9_0 aws-c-sdkutils 0.1.6 h80987f9_0 aws-checksums 0.1.13 h80987f9_0 aws-crt-cpp 0.18.16 h313beb8_0 aws-sdk-cpp 1.10.55 h313beb8_0 babel 2.16.0 pypi_0 pypi beautifulsoup4 4.12.3 py311hca03da5_0 blas 2.122 openblas conda-forge blas-devel 3.9.0 22_osxarm64_openblas conda-forge bleach 6.1.0 pyhd8ed1ab_0 conda-forge blosc 1.21.5 h9c252e8_1 conda-forge bokeh 3.5.2 pypi_0 pypi boltons 23.0.0 py311hca03da5_0 boost-cpp 1.82.0 h48ca7d4_2 bottleneck 1.3.7 py311hb9f6ed7_0 branca 0.7.2 pyhd8ed1ab_0 conda-forge brotli 1.0.9 h80987f9_8 brotli-bin 1.0.9 h80987f9_8 brotli-python 1.0.9 py311h313beb8_8 build 0.9.0 pypi_0 pypi bzip2 1.0.8 h80987f9_6 c-ares 1.32.2 h99b78c6_0 conda-forge ca-certificates 2024.8.30 hf0a4a13_0 conda-forge cairo 1.16.0 h302bd0f_5 cartopy 0.22.0 py311h7aedaa7_0 certifi 2024.8.30 pyhd8ed1ab_0 conda-forge cffi 1.16.0 py311h80987f9_1 cfgv 3.4.0 pypi_0 pypi cfitsio 3.470 ha83d327_7 conda-forge cftime 1.6.2 py311ha0d4635_0 charset-normalizer 3.3.2 pyhd8ed1ab_0 conda-forge click 8.1.7 unix_pyh707e725_0 conda-forge click-plugins 1.1.1 py_0 conda-forge cligj 0.7.2 pyhd8ed1ab_1 conda-forge cloudpickle 3.0.0 pyhd8ed1ab_0 conda-forge colorama 0.4.6 pyhd8ed1ab_0 conda-forge colorcet 3.1.0 pyhd8ed1ab_0 conda-forge comm 0.2.1 py311hca03da5_0 conda 24.9.1 py311h267d04e_0 conda-forge conda-libmamba-solver 24.1.0 pyhd3eb1b0_0 conda-package-handling 2.3.0 py311hca03da5_0 conda-package-streaming 0.10.0 py311hca03da5_0 contourpy 1.2.0 py311h48ca7d4_0 cycler 0.12.1 pyhd8ed1ab_0 conda-forge cyrus-sasl 2.1.28 h9131b1a_1 cytoolz 0.12.2 py311h80987f9_0 dask 2024.7.0 pyhd8ed1ab_0 conda-forge dask-core 2024.7.0 pyhd8ed1ab_0 conda-forge dask-expr 1.1.7 pyhd8ed1ab_0 conda-forge datashader 0.16.3 pyhd8ed1ab_0 conda-forge debugpy 1.6.7 py311h313beb8_0 decorator 5.1.1 pyhd3eb1b0_0 defusedxml 0.7.1 pyhd3eb1b0_0 distlib 0.3.8 pypi_0 pypi distributed 2024.7.0 pyhd8ed1ab_0 conda-forge distro 1.9.0 py311hca03da5_0 docutils 0.21.2 pypi_0 pypi executing 0.8.3 pyhd3eb1b0_0 expat 2.6.3 hf9b8971_0 conda-forge filelock 3.15.4 pypi_0 pypi fiona 1.9.1 py311habcf648_0 conda-forge fmt 9.1.0 hffc8910_0 conda-forge folium 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conda-forge terminado 0.17.1 py311hca03da5_0 threadpoolctl 3.5.0 pyhc1e730c_0 conda-forge tiledb 2.3.3 hb4a6b97_3 tinycss2 1.2.1 py311hca03da5_0 tk 8.6.14 h6ba3021_0 toolz 0.12.1 pyhd8ed1ab_0 conda-forge tornado 6.4.1 py311h80987f9_0 tqdm 4.66.4 pyhd8ed1ab_0 conda-forge traitlets 5.14.3 pyhd8ed1ab_0 conda-forge truststore 0.8.0 py311hca03da5_0 types-python-dateutil 2.9.0.20240906 pypi_0 pypi typing-extensions 4.11.0 py311hca03da5_0 typing_extensions 4.11.0 py311hca03da5_0 tzdata 2024a h04d1e81_0 uc-micro-py 1.0.3 pyhd8ed1ab_0 conda-forge uri-template 1.3.0 pypi_0 pypi uriparser 0.9.8 h00cdb27_0 conda-forge urllib3 2.2.2 pyhd8ed1ab_0 conda-forge utf8proc 2.6.1 h80987f9_1 uxarray 2024.8.3.dev168+g8a1cdc40.d20241010 pypi_0 pypi virtualenv 20.26.3 pypi_0 pypi watchfiles 0.24.0 py311h481aa64_1 conda-forge wcwidth 0.2.5 pyhd3eb1b0_0 webcolors 24.8.0 pypi_0 pypi webencodings 0.5.1 pyhd8ed1ab_2 conda-forge websocket-client 1.8.0 py311hca03da5_0 wheel 0.43.0 py311hca03da5_0 widgetsnbextension 4.0.10 py311hca03da5_0 wrapt 1.16.0 py311h460d6c5_1 conda-forge xarray 2024.6.0 pyhd8ed1ab_1 conda-forge xerces-c 3.2.4 h313beb8_1 xyzservices 2024.6.0 pyhd8ed1ab_0 conda-forge xz 5.4.6 h80987f9_1 yaml 0.2.5 h3422bc3_2 conda-forge yaml-cpp 0.8.0 h13dd4ca_0 conda-forge zeromq 4.3.5 h313beb8_0 zict 3.0.0 pyhd8ed1ab_0 conda-forge zipp 3.19.2 pyhd8ed1ab_0 conda-forge zlib 1.2.13 hfb2fe0b_6 conda-forge zstandard 0.22.0 py311h1a4646a_0 zstd 1.5.5 hd90d995_2 ```

Description of expected behavior and the observed behavior

Slight clipping with projected plots near the bottom of the figure when using "bokeh" backend.

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

# any geodataframe with polygons 
gdf = ... 

# polygon plot
gv.Polygons(gdf).opts(projection=ccrs.Robinson(), global_extent=True)

# point plot
gv.Points(gdf).opts(projection=ccrs.Robinson(), global_extent=True)

Screenshots or screencasts of the bug in action

This is the default zoom frame

Zooming out slightly shows the clipped border on the bottom of the frame

Using the MPL backend, the default zoom contains the entire figure.

[x] I may be interested in making a pull request to address this

ahuang11 commented 1 month ago

To clarify, do you mean the horizontal black line?

philipc2 commented 1 month ago

To clarify, do you mean the horizontal black line?

Correct. The black outline around the plot.

ahuang11 commented 1 month ago

Workaround might be .opts(padding=0.1) (not sure if that actually works)

If I were to take a wild guess on how to fix it, I think you need to find where/what draws the globe's outline, and then have it apply_extent=True or apply_ranges=True

import holoviews as hv

hv.Curve([0, 1, 2]) * hv.Curve([3, 4, 5]).opts(apply_ranges=False)

^ here, the red line doesn't show up because when apply_ranges=False is set, it's not included in its bounds calculation.

philipc2 commented 1 month ago

https://github.com/holoviz/geoviews/blob/5f02c718f76984aa01b5e9a70e3012f7eebd0429/geoviews/plotting/bokeh/plot.py#L112-L123

This appears to be the code that sets up the outline's projection.

I've tried to add combinations of apply_extent=True and apply_ranges=True to the Shape and GeoShape respectively with no visual changes.

philipc2 commented 1 month ago

Made a modification that scales the boundary in the Y direction which should help debug what changes need to me made to have the outline show up in the figure.

    def initialize_plot(self, ranges=None, plot=None, plots=None, source=None):
        opts = {} if isinstance(self, HvOverlayPlot) else {'source': source}
        fig = super().initialize_plot(ranges, plot, plots, **opts)
        if self.geographic and self.show_bounds and not self.overlaid:
            from . import GeoShapePlot

            # ========================================================================================
            from shapely.affinity import scale
            # scale bounds in the Y direction to test apply_ranges
            bounds = scale(self.projection.boundary, yfact=1.5, origin=(0, 0))
            # ======================================================================================

            shape = Shape(bounds, crs=self.projection).options(fill_alpha=0)
            shapeplot = GeoShapePlot(shape, projection=self.projection,
                                     overlaid=True,
                                     renderer=self.renderer)
            shapeplot.geographic = False
            shapeplot.initialize_plot(plot=fig)
        self._set_unwrap_lons(self.current_frame)
        return fig

ahuang11 commented 1 month ago

What if you changed the padding slightly?

philipc2 commented 1 month ago

What if you changed the padding slightly?

Padding of the boundary shape or the entire figure?

holoviz / geoviews