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Exercise

sf plots with ggplot

You may also be familiar with the ggplot2 library, where a ggplot plot is made of several layers.

It turns out that sf objects can also be plotted using the ggplot2 library. As a quick revision, recall that the first layer is a blank canvas that's created by ggplot(). Subsequent layers are placed on top of each other by adding geom functions (which take the form geom_<plot>), labs(), themes and the like.

In the following, you will build a ggplot map using several sf objects.

The listings dataframe, a multipolygon called london_poly, and a collection of points called num_listings have also been loaded. The tidyverse and sf libraries have already been imported.

Instructions

100 XP
  • Set the coordinates reference system (CRS) of num_listings to that of london_poly.
  • Add the multipolygon to the blank canvas.
  • Set the fill argument such that each neighborhood, as seen in the Name attribute, has a different fill.
  • Add a label at the center of each polygon.