plotting pie graphs on map in ggplot

Question

This may be a wish list thing, not sure (i.e. maybe there would need to be the creation of geom_pie for this to occur). I saw a map today (LINK) with pie graph

Answer 1

A slight variation on the OP's original requirements, but this seems like an appropriate answer/update.

If you want an interactive Google Map, as of googleway v2.6.0 you can add charts inside info_windows of map layers.

see ?googleway::google_charts for documentation and examples

library(googleway)

set_key("GOOGLE_MAP_KEY")

## create some dummy chart data
markerCharts <- data.frame(stop_id = rep(tram_stops$stop_id, each = 3))
markerCharts$variable <- c("yes", "no", "maybe")
markerCharts$value <- sample(1:10, size = nrow(markerCharts), replace = T)

chartList <- list(
  data = markerCharts
  , type = 'pie'
  , options = list(
    title = "my pie"
    , is3D = TRUE
    , height = 240
    , width = 240
    , colors = c('#440154', '#21908C', '#FDE725')
    )
  )

google_map() %>%
  add_markers(
    data = tram_stops
    , id = "stop_id"
    , info_window = chartList
  )