legendTypo: Legend for Typology Maps

In cartography: Thematic Cartography

Legend for Typology Maps

Description

Plot legend for typology maps.

Usage

legendTypo(
  pos = "topleft",
  title.txt = "Title of the legend",
  title.cex = 0.8,
  values.cex = 0.6,
  col,
  categ,
  cex = 1,
  nodata = TRUE,
  nodata.txt = "No data",
  nodata.col = "white",
  frame = FALSE,
  symbol = "box"
)

Arguments

pos	position of the legend, one of "topleft", "top", "topright", "right", "bottomright", "bottom", "bottomleft", "bottomleftextra", "left" or a vector of two coordinates in map units (c(x, y)).
title.txt	title of the legend.
title.cex	size of the legend title.
values.cex	size of the values in the legend.
col	a vector of colors.
categ	vector of categories.
cex	size of the legend. 2 means two times bigger.
nodata	if TRUE a "no data" box or line is plotted.
nodata.txt	label for "no data" values.
nodata.col	color of "no data" values.
frame	whether to add a frame to the legend (TRUE) or not (FALSE).
symbol	character; 'line' or 'box'

Examples

library(sf)
mtq <- st_read(system.file("gpkg/mtq.gpkg", package="cartography"))
plot(st_geometry(mtq))
box()

# Define labels and colors
someLabels <- c("red color", "yellow color", "green color", "black color")
someColors <- c("red", "yellow", "green", "black")

# plot legend
legendTypo(pos = "bottomleft", title.txt = "Title of the legend", title.cex = 0.8,
           values.cex = 0.6, col = someColors, categ = someLabels, 
           cex = 0.75,
           nodata = TRUE, nodata.txt = "no data", frame = TRUE, symbol="box")
legendTypo(pos = "topright", title.txt = "", 
           title.cex = 1.5, cex = 1.25,
           values.cex = 1, col = someColors, categ = someLabels, 
           nodata = FALSE, frame = FALSE, symbol="line")

cartography documentation built on Aug. 8, 2025, 6:25 p.m.