Memplot DataCamp HQ

Peta Interaktif dengan leaflet di R

Rich Majerus

Vice President of Strategy & Planning, Queens University of Charlotte

Memplot Satu Titik

# add marker layer to map
leaflet() %>% 
     addTiles() %>% 
     addMarkers(lng = -73.98575, 
                lat = 40.74856)

Contoh satu penanda

Menyediakan data penanda
- Kolom kerangka data numerik
- Vektor numerik
Bawaan addMarkers()
- Berpusat pada satu titik
- Zoom menyesuaikan semua titik

Memplot Banyak Titik

dc_hq <- 
     tibble(
         hq  = c("DataCamp - NYC", "DataCamp - Belgium"),
         lon = c(-73.98575, 4.717863),
         lat = c(40.74856, 50.881363))
leaflet() %>% 
     addTiles() %>% 
     addMarkers(lng = dc_hq$lon, lat = dc_hq$lat)

Contoh banyak penanda

Memplot Banyak Titik II

# When piping a data frame into the leaflet function, R will search 
# for columns named lat/latitude and lon/lng/long/longitude  
dc_hq  %>% 
     leaflet() %>% 
     addTiles() %>% 
     addMarkers() 
Assuming 'lon' and 'lat' are longitude and latitude, respectively

Contoh banyak penanda

Pop-up

leaflet() %>% 
     addTiles() %>% 
     addMarkers(lng = dc_hq$lon, lat = dc_hq$lat, 
               popup = dc_hq$hq)

Contoh penanda dengan pop-up

Pop-up II

leaflet() %>% 
     addTiles() %>% 
     addPopups(lng = dc_hq$lon, lat = dc_hq$lat,
               popup = dc_hq$hq)

Contoh pop-up

Menyimpan Peta leaflet sebagai Objek

m <- leaflet() %>%
     addTiles()  %>% 
     setView(lng = dc_hq$lon[1], 
             lat = dc_hq$lat[1], 
             zoom = 12)

Menyimpan peta sebagai objek

# %>% leaflet objects to functions 
# to add or edit layers
m %>% addMarkers(lng = dc_hq$lon, 
                 lat = dc_hq$lat, 
                 popup = dc_hq$hq)

Menambahkan ke lapisan

Ayo berlatih!

Peta Interaktif dengan leaflet di R