Legacy 'sp' notice on 'sf' startup

[francisbarton]

My package uses some sf functions. I don't call sp functions directly anywhere and only sf is in my Imports list in the DESCRIPTION file.
I also have tmap in my Suggests list.

When I load my package, I get the

The legacy packages maptools, rgdal, and rgeos, underpinning the sp package,
which was just loaded, will retire in October 2023....

startup message at the console. I don't think this message applies to my package as I am already using pure sf and not relying directly on sp. How can I turn this message off please?

[rsbivand]

Please name your package. Then track back through its strong dependencies, to find the subset of packages with strong dependencies on sp, may be tmap, others too.

[francisbarton]

Thanks Roger. My package is not on CRAN so no need to worry about it as a revdep for sp.

I am sure it is the tmap package that is generating the message. When I do library(tmap) I get the same message. Presumably because it Imports stars.

If I remove tmap from my Suggests list, then reload my package, I don't get the message.
I didn't think packages in the Suggests list were loaded when a package is loaded, but that is an issue for another place, not here.

[francisbarton]

r-tmap/tmap#738 confirms that this is due to indirect dependencies of tmap.