Issues with Projected Polygons when using `hv.operation.datashader.rasterize` with "bokeh" backend

[philipc2]

ALL software version info

Mac OS, M1 Mac

GeoViews: '1.12.0'
HoloViews: 1.19.1'

Description of expected behavior and the observed behavior

I am looking to rasterize projected polygons using HoloViews. However, when I rasterize them, the projection appears to have been lost. This only occurs with the "bokeh" backend.

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

import holoviews as hv
import geoviews as gv
import cartopy.crs as ccrs


hv.extension("bokeh")

# GeoDataFrame with polygons already pre-projected 
gdf = ... 

projection = ccrs.Robinson()

out = gv.Polygons(gdf, crs=projection).opts(projection=projection, width=700, height=350, global_extent=True)

hv.operation.datashader.rasterize(out)

Screenshots or screencasts of the bug in action

Here is the plot of the gv.Polygons()

When I rasterize them, I get the following:

[ahuang11]

What if it's not pre-projected?

[philipc2]

What if it's not pre-projected?

Do you mean using not pre-projected data and then projecting using GeoViews?

[ahuang11]

Correct; I'm wondering if there's logic in GeoViews if crs == projection, it's not properly projecting on the map.