inlmisc (version 0.2.4)

AddScaleBar: Add Scale Bar to Plot

Description

This function can be used to add a scale bar to a plot.

Usage

AddScaleBar(asp = 1, unit = NULL, is.lonlat = FALSE,
  loc = c("bottomleft", "topleft", "topright", "bottomright"), offset = c(0,
  0), lab.vert.exag = NULL)

Arguments

asp

numeric. The y/x aspect ratio for spatial axes.

unit

character. Axis unit of measurement, for example "METERS".

is.lonlat

logical. If true, plot coordinates are in longitude and latitude.

loc

character. Position of the scale bar in the plot region: "bottomleft", "topleft", "topright", or "bottomright" to denote scale location.

offset

numeric. The x and y adjustments of the scale bar, in inches.

lab.vert.exag

logical. If true, a label is drawn specifying the vertical exaggeration.

Value

Used for the side-effect of a scale bar drawn on the current graphics device.

See Also

PlotCrossSection, PlotMap

Examples

plot(-100:100, -100:100, type = "n", xlab = "x", ylab = "y", asp = 2)
AddScaleBar(2, unit = "FEET", loc = "topleft")
AddScaleBar(2, unit = "METERS", loc = "bottomright", offset = c(-0.2, 0))