text: Add labels to a map

In rspatial/terra: Spatial Data Analysis

Add labels to a map

Description

Plots labels, that is a textual (rather than color) representation of values, on top an existing plot (map).

Usage

## S4 method for signature 'SpatRaster'
text(x, labels, digits=0, halo=FALSE, ...)

## S4 method for signature 'SpatVector'
text(x, labels, halo=FALSE, inside=FALSE, ...)

Arguments

x	SpatRaster or SpatVector
labels	character. Optional. Vector of labels with length(x) or a variable name from names(x)
digits	integer. How many digits should be used?
halo	logical. If TRUE a "halo" is printed around the text. If TRUE, additional arguments hc="white" and hw=0.1 can be modified to set the color and width of the halo
inside	logical. Should the text always be placed inside one the sub-geometries?
...	additional arguments to pass to graphics function text

See Also

text, plot, halo

Examples

 
r <- rast(nrows=4, ncols=4)
values(r) <- 1:ncell(r)
plot(r)
text(r)

plot(r)
text(r, halo=TRUE, hc="blue", col="white", hw=0.2)

plot(r, col=rainbow(16))
text(r, col=c("black", "white"), vfont=c("sans serif", "bold"), cex=2)

rspatial/terra documentation built on Nov. 5, 2024, 5:13 p.m.