R: Add or remove a scale bar

addScaleBar {leaflet} | R Documentation

## Add or remove a scale bar

### Description

Uses Leaflet's built-in scale bar feature to add a scale bar.

### Usage

    addScaleBar(map, position = c("topright", "bottomright", "bottomleft",
      "topleft"), options = scaleBarOptions())

    scaleBarOptions(maxWidth = 100, metric = TRUE, imperial = TRUE,
      updateWhenIdle = TRUE)

    removeScaleBar(map)

### Arguments

`map` | the map to add the scale bar to
`position` | position of control: 'topleft', 'topright', 'bottomleft', or 'bottomright'
`options` | a list of additional options, intended to be provided by a call to `scaleBarOptions`
`maxWidth` | maximum width of the control in pixels (default 100)
`metric` | if `TRUE` (the default), show a scale bar in metric units (m/km)
`imperial` | if `TRUE` (the default), show a scale bar in imperial units (ft/mi)
`updateWhenIdle` | if `FALSE` (the default), the scale bar is always up-to-date (updated on `move`). If `TRUE`, the control is updated on `moveend`.

### Examples

    leaflet() %>%
      addTiles() %>%
      addScaleBar()

[Package leaflet version 1.1.0 Index]