mf_annotation function

Plot an annotation

Plot an annotation on a map.

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

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"
• 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.

Returns

No return value, an annotation is displayed.

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
)