総まとめ

R で作る leaflet のインタラクティブマップ

Rich Majerus

Vice President of Strategy & Planning, Queens University of Charlotte

復習

LeafletとHTMLウィジェット
ベースマップ
サークルマーカー
カラーパレット
ポリゴン
レイヤー
装飾

NCの対数所得コロプレス図2

NCの対数所得コロプレス図3

総まとめ

leaflet() %>% 
  addTiles(group = "OSM") %>% 
  addProviderTiles("CartoDB", group = "Carto") %>% 
  addProviderTiles("Esri", group = "Esri") %>%

  addPolygons(data = shp, weight = 1, fillOpacity = .75,
              color =  ~nc_pal(log(mean_income)),
              label = ~paste0("Mean Income: ", 
                              dollar(mean_income)),
              group = "Mean Income") %>%

総まとめ

  addCircleMarkers(data = nc_public, radius = 2, 
                   label = ~htmlEscape(name), 
                   color = ~pal(sector_label),group = "Public") %>% 
  addCircleMarkers(data = nc_private, radius = 2, 
                   label = ~htmlEscape(name),
                   color = ~pal(sector_label), group = "Private") %>% 
  addCircleMarkers(data = nc_profit, radius = 2, 
                   label = ~htmlEscape(name),
                   color = ~pal(sector_label),
                   group = "For-Profit") %>% 

  addLayersControl(baseGroups = c("OSM", "Carto", "Esri"), 
                   overlayGroups = c("Public", "Private",
                                     "For-Profit",
                                     "Mean Income"))

総まとめ

NCの対数所得コロプレス図4

マップの保存

# Store leaflet map in object
m <- leaflet() %>% 
     addTiles() %>%
     addMarkers(data = ipeds,
                clusterOptions = markerClusterOptions()) %>% 
     addPolygons(data = shp)

# save leaflet object as html file
library(htmlwidgets)

saveWidget(m, file="myMap.html")

練習しましょう！

R で作る leaflet のインタラクティブマップ