How to have a combined hover tooltip for multiple images on a tile map?

HoloViews
3

reproducible example:

import xarray as xr
import holoviews as hv
import bokeh as bk

ds = xr.tutorial.open_dataset("air_temperature").isel(time=0)
ds["airx2"] = ds["air"] * 2

hover = bk.models.HoverTool(tooltips=[
    ('air 1', "@air"),
    ('air 2', "@airx2"),
])

hv.Image(ds, ["lon", "lat"], ["air", "air", "airx2"]).opts(tools=[hover])

image

If you don’t want to repeat vdim,

import xarray as xr
import holoviews as hv
import bokeh as bk

ds = xr.tutorial.open_dataset("air_temperature").isel(time=0)
ds["airx2"] = ds["air"] * 2

hover = bk.models.HoverTool(tooltips=[
    ('air 1', "@image"),
    ('air 2', "@airx2"),
])

hv.Image(ds, ["lon", "lat"], ["air", "airx2"]).opts(tools=[hover])