In this chapter, you learned how to use the most common file format for geographical data: the shapefile. You also learned how to use the esri-leaflet plugin to connect to ESRI services and add basemaps as well as five other ESRI layer types. You already learned about heatmaps previously, but in this chapter, you also learned how to consume ESRI services and add them as a heatmap. You learned how to geocode an address to a map and also how to reverse geocode a point to a street address. Lastly, you learned how to query an ESRI service first by attribute and then by location.

In the next chapter, you will combine everything you have learned to create an application using Leaflet with other programming languages.