Scalebar breaks

[jordanbranham]

Hi there, I noticed there's an open issue somewhat, but not exactly, related to this: is there a way to specify the number of black and white bar segments with annotation_scale() (or alternatively, the number of tick marks)? Or is this dependent on a specification elsewhere within one's ggplot code? I haven't been able to track down any documentation or prior questions about this. My default 'bar' style scale bar has 5 sections, 3 black and 2 white. I'd like to create a scalebar that looks like the one depicted in the example on the reference page (annotation-scale.R), with one black and one white section. Let me know if posting an example would be helpful. Thank you!

[paleolimbot]

Sorry this took me a few days!

You can't configure the exact number of sections for the scalebar, but you can configure how wide it is using width_hint:

library(ggspatial)

cities <- data.frame(
  x = c(-63.58595, 116.41214),
  y = c(44.64862, 40.19063),
  city = c("Halifax", "Beijing")
)

ggplot(cities) +
  geom_spatial_point(aes(x, y), crs = 4326) +
  annotation_scale(width_hint = 0.6) +
  coord_sf(crs = 3995)

I believe the ggsn package has an option to make a scalebar with a fixed length if you need that behaviour!

[jordanbranham]

No worries! I appreciate the response. Would it be possible (or complicated) to add this as a feature request for a future version? (I'm pretty new to using Github so let me know if this should go elsewhere) I've explored ggsn previously but have found it a bit more unwieldy, and it doesn't appear to be updated as often. If not, no worries of course -- I can see there's already a lot of changes on tap with the ggplot update. Either way, appreciate all your work providing and maintaining ggspatial!

[paleolimbot]

I've been putting development focus elsewhere for the time being to support cleaner code to back up the scalebar and map tiling, so it's unlikely it'll make it as a feature soon!