Question

How to add external markers in maps?

Answer 1

Use external markers by creating icons using icons() function.

Ex:

smile = makeIcon(iconUrl = "smilie.png", iconHeight, iconWidth, ...)

or use icons () function

smile = icons (iconUrl = "smilie.png", iconHeight, iconWidth, ...)

Use the created icon as a marker by providing the icon attribute as the above created variable.

leaflet(data = df) %>% addTiles() %>% addMarkers(~long, ~lat, icon = smile)