Features of the leaflet in R

Features of the leaflet in R

Supports interactive maps that provide features like panning and zooming.Supports various elements for the composition of maps such as Map tiles, Markers, Polygons, Lines, Popups, and GeoJSON.Supports full dynamic map creation from the R Console itself.Easy to embed map objects in various markdown files.Can also display maps in non-spherical Mercator projectionsAugment map features using chosen plugins from the leaflet in r plugins repository...

Installation of leaflet in R

We can install the leaflet library in the R Language by using:...

Creating Interactive maps using leaflet leaflet in R

To create a map widget using the leaflet package in the R Language we use the leaflet() function. The leaflet() function returns a map object that can be viewed in itself or can be modified by adding more layers. The basic leaflet widget shows an empty map widget with no tiles or markers....

Adding tiles to map

Since above code creates a map widget that is empty. To add tiles to it for the creation of the desired map we use the addTiles() function of the leaflet package. By default, if no argument is passed it creates an OpenStreetMap map tile on top of the map widget. For custom map tile we pass that map as an argument to the addTiles() function....

Adding Markers on Map

Now since we have created a basic map, it in itself is not that useful. we can now add markers on the map using the addMarkers() function of the leaflet package. we can add as many markers as we require by just adding new layers....

Layer Control

We can add multiple layers to the leaflet in r map using addTiles() or addMarker() function. Now if we want to give the user a choice of which layer he/she wants to look at, we can do that by using layer control. Layers can be assigned to named groups. To name a group in the leaflet we add group argument to that layer. Now, these groups can be toggled on and off by the user. The Base Groups that form the basics of the map for example tiles are selected with radio buttons so that you can only choose one at a time, and the Overlay Groups that can have multiple layers active at the same time get checkboxes....

Plot data on top of map

Spatial objects in your R environment can also be added as map layers, provided that they have a CRS defined with a datum. We can use those data points on top of the leaflet in r map using the addMarkers() or the addPloygons() function depending on the type of dataset. If the dataset is single-dimensional we use markers and for multidimensional data we use polygons....