How to add a scale bar to a leaflet map?

[Tom Porteus]

Hi everyone,

I'm creating an interactive map using leaflet which I want to incorporate into a shiny app.  I am pretty much there with it but am stuck on how to add a scale bar to a leaflet map.  I can only think it is via addControl() but I have not been able to get it to work.  The relevant leaflet js command is L.control.scale().addTo(map);.  I'm not sure how to translate this into something which R will use with the addControl() function.  Or perhaps I am just barking up the wrong tree?

A scale bar seems a fairly generic feature so presumably someone out there has managed to get it to work?  I'll look forward to hearing from you!

Many thanks,

Tom

[John Goldin]

Did you ever figure this out? I have been doing some googling, but have not found any examples of how to use addControl with any of the variations in the Leaflet api documentation.

[Martin Lavoie]

Hi!

you just need to add addScaleBar(position = c("bottomleft")) to your map!

Martin

[John Goldin]

With Leaflet 1.0.1 from the repository I don't have addScaleBar. I Installed leaflet_1.0.1.9004 from github and it worked.  I'll wait until a leaflet update is released before I try to use addScaleBar with my published map.