Map component: scale bar — tm_scale

This function was renamed to tm_scalebar() in tmap v4.0.

Usage

tm_scale_bar(...)

Arguments

...

Arguments passed on to tm_scalebar

breaks: breaks
width: width of the scale bar. Units are number of text line heights, which is similar to the number of characters.
text.size: text size
text.color: text.color
color.dark: color.dark
color.light: color.light
lwd: linewidth
size: Deprecated (use text.size instead)
stack: stack with other map components, either "vertical" or "horizontal".
margins: margins
frame: frame should a frame be drawn?
frame.color: frame color
frame.alpha: frame alpha transparancy
frame.lwd: frame line width
frame.r: Radius of the rounded frame corners. 0 means no rounding.
bg: Show background?
bg.color: Background color
bg.alpha: Background transparency
position: The position specification of the component: an object created with tm_pos_in() or tm_pos_out(). Or, as a shortcut, a vector of two values, specifying the x and y coordinates. The first is "left", "center" or "right" (or upper case, meaning tighter to the map frame), the second "top", "center" or "bottom". Numeric values are also supported, where 0, 0 means left bottom and 1, 1 right top. See also vignette about positioning. In case multiple components should be combined (stacked), use group_id and specify component in tm_comp_group().
group_id: Component group id name. All components (e.g. legends, titles, etc) with the same group_id will be grouped. The specifications of how they are placed (e.g. stacking, margins etc.) are determined in tm_comp_group() where its argument id should correspond to group_id.
z: z index, e.g. the place of the component relative to the other componets