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Putting it all Together

Let's try putting this all together at one time. Building our interactive map of every four-year college in America can be broken down into four steps:

  1. Initialize the web map
  2. Lay down our base maps
  3. Plot each sector of colleges as its own layer
  4. Add layer controls so users can toggle base and overlay groups

The public, private, and profit data frames as well as the color palette pal have been loaded for you.

This exercise is part of the course

Interactive Maps with leaflet in R

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Exercise instructions

  • Fill in the function names to create an interactive web map that has multiple overlay and base map groups.

Hands-on interactive exercise

Have a go at this exercise by completing this sample code.

m4 <- ___() %>% 
        ___(group = "OSM") %>% 
        ___("CartoDB", group = "Carto") %>% 
        ___("Esri", group = "Esri") %>% 
        ___(data = public, radius = 2, label = ~htmlEscape(name),
                         color = ~pal(sector_label),  group = "Public") %>% 
        ___(data = private, radius = 2, label = ~htmlEscape(name),
                           color = ~pal(sector_label), group = "Private")  %>% 
        ___(data = profit, radius = 2, label = ~htmlEscape(name),
                         color = ~pal(sector_label), group = "For-Profit")  %>% 
        ___(baseGroups = c("OSM", "Carto", "Esri"), 
                         overlayGroups = c("Public", "Private", "For-Profit")) %>% 
        ___(lat = 39.8282, lng = -98.5795, zoom = 4) 

m4
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