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Creating your first leaflet map

You have seen how leaflet maps can be created as a collection of different layers.

There are also other settings that can allow users to select specific layers and map providers.

In this exercise, you will create your own leaflet map with various features.

There are four sf objects stored here as:

  • london_poly
  • london_loop
  • london_capital
  • listings_geo

You can look at the geometry attribute of each sf object with the $geometry notation.

The sf, tidyverse and leaflet libraries have been loaded.

Latihan ini adalah bagian dari kursus

Building Dashboards with shinydashboard

Lihat Kursus

Petunjuk latihan

  • Add another provider called Esri.WorldStreetMap.
  • Add red polygons.
  • Fill up addLayersControl() so that different overlay groups and layers can be selected by the user, adding them in their order of appearance.

Latihan interaktif praktis

Cobalah latihan ini dengan menyelesaikan kode contoh berikut.

leaflet(london_poly) %>% 
  addTiles(group="Default") %>%  
  addProviderTiles(providers$Stamen.Toner, group = "Toner") %>%
  # Add another provider called Esri.WorldStreetMap
  ___(___, group = "World street map") %>%
  # Add red polygons 
  ___(group = "Ward", col=___, label=~as.character(Name)) %>% 
  addPolylines(loop_geo[,1], loop_geo[,2], group = "London loop") %>%
  addPolylines(capital_geo[,1], capital_geo[,2],
               group = "Capital ring", color = "orange") %>%
    addMarkers(data = listings_geo,
             group = "Listings", clusterOptions = markerClusterOptions()) %>% 
  # Set up to allow user selection of different overlay groups and layers
  ___
Edit dan Jalankan Kode