R: Add labels to a map

text {terra} | R Documentation

## 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, ...)

### 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 colour and width of the halo
`...` | additional arguments to pass to graphics function `text`

### See Also

`text, plot`

### 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)

[Package terra version 1.4-7 Index]