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  3. Interactive Maps with leaflet in R

Exercise

Cleaning up the Base Map

If you are storing leaflet maps in objects, there will come a time when you need to remove markers or reset the view. You can accomplish these tasks with the following functions.

  • clearMarkers()- Remove one or more features from a map
  • clearBounds()- Clear bounds and automatically determine bounds based on map elements

To remove the markers and to reset the bounds of our m map we would:

m <- m  %>% 
        addMarkers(lng = dc_hq$lon, lat = dc_hq$lat) %>% 
        setView(lat = 50.9, lng = 4.7, zoom = 5)

m  %>% 
    clearMarkers() %>% 
    clearBounds()

The leaflet map of DataCamp's headquarters has been printed for you.

Instructions 1/2

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  • Use clearMarkers() to remove markers and clearBounds() to restore the default view and store in the map_clear object.