Clustering markers to improve our map

As we already saw, creating markers and adding them to a map is not a difficult task at all. There are circumstances in which creating the markers one by one may work; however, what happens if the data we want to visualize has thousands of records?

Populating the map with large amounts of data is inefficient performance-wise, and the lag dominates the user experience. The user will not be able to distinguish the markers and have a clear picture of what is going on in this crowded map. Surely, this is a poor user experience.

In this recipe, you will learn how to use clustering to present data in a more efficient and clean way.

How to do it…

Perform the following steps:

1. Import the Leaflet.markercluster plugin.

2. Create a new featureLayer and add the data you want to use as features.

3. Once the data in the featureLayer is loaded, create a clusterGroup and add the features layer to it.

Creating markers

Perform the following steps:

1. Open the chapter-4-example6-starter...