Unable to add text annotation to geom_sf plot

[sschloss1]

I would like to use relative positioning (0-1 scale) to add a text annotation to a ggplot object that uses geom_sf. I've tried two different methods that were mentioned here, but both seem to fail with different results.

First attempt, using Hadley's suggestion does produce any annotation:

library(ggplot2)
ggplot(nc, aes(fill=AREA)) + 
  geom_sf() + 
  annotate("text", -Inf, Inf, label = "Top-left", hjust = 0, vjust = 1)

I never see "Top-left" on the plot no matter what values I've tried for hjust or vjust.

Second attempt, using textGrob (via this comment):

library(sf)
library(ggplot2)
library(grid)
nc = st_read(system.file("shape/nc.shp", package="sf"))
ggplot(nc) +geom_sf(aes(fill = AREA))+
	annotation_custom(textGrob(label="xx"))

This results in "Error in grid.Call.graphics(C_setviewport, vp, TRUE): non-finite location and/or size for viewport". I get the same results if I specify x and y locations in textGrob with different units (npc, cm, lines).

Any help would be most welcome. Thanks.

[yutannihilation]

Could you file this issue on ggplot2's repo? I guess coord_sf() forgets to squash Inf within the range, which coord_cartesian() does.

[sschloss1]

Filed with ggplot2 at tidyverse/ggplot2#2971

[yutannihilation]

Thanks! I think you can close this issue here.