mapsf (version 1.0.0)

mf_annotation: Plot an annotation

Description

Plot an annotation on a map.

Usage

mf_annotation(
  x,
  txt,
  pos = "topright",
  cex = 0.8,
  col_arrow,
  col_txt,
  halo = FALSE,
  bg,
  s = 1,
  ...
)

Value

No return value, an annotation is displayed.

Arguments

x

an sf object with 1 row, a couple of coordinates (c(x, y)) or "interactive"

txt

the text to display

pos

position of the text, one of "topleft", "topright", "bottomright", "bottomleft" or "center"

cex

size of the text

col_arrow

arrow color

col_txt

text color

halo

add a halo around the text

bg

halo color

s

arrow size (min=1)

...

further text arguments.

Examples

mtq <- mf_get_mtq()
mf_map(mtq)
mf_annotation(
  x = c(711167.8, 1614764),
  txt = "Look!\nImportant feature\nhere!",
  pos = "bottomleft", cex = 1.2, font = 2,
  halo = TRUE, s = 1.5
)

mf_annotation(
  x = mtq[20, ],
  txt = "This is less\nimportant",
  cex = .7, font = 3, s = 1.3
)