scalebar function

scalebar

Add a scalebar to a plot

scalebar(d, xy = NULL, type = "line", divs = 2, below = "", 
       lonlat = NULL, label, adj=c(0.5, -0.5), lwd = 2, ...)

Arguments

• d: distance covered by scalebar
• xy: x and y coordinate to place the plot. Can be NULL. Use xy=click() to make this interactive
• type: "line" or "bar"
• divs: Number of divisions for a bar type. 2 or 4
• below: Text to go below scalebar (e.g., "kilometers")
• lonlat: Logical or NULL. If logical, TRUE indicates if the plot is using longitude/latitude coordinates. If NULL this is guessed from the plot's coordinates
• adj: adjustment for text placement
• label: Vector of three numbers to label the scale bar (beginning, midpoint, end)
• lwd: line width for the "line" type scalebar
• ...: arguments to be passed to other methods

Returns

None. Use for side effect of a scalebar added to a plot

See Also

plot

Author(s)

Robert J. Hijmans; partly based on a function by Josh Gray

Examples

f <- system.file("external/test.grd", package="raster")
r <- raster(f)
plot(r)
scalebar(1000)
scalebar(1000, xy=c(178000, 333500), type='bar', divs=4)