How To Create A Map Using Ggplot2. But if ggplot2 is your graphics package of choice you can stick with the visual metaphor and syntax and still make beautiful maps. You can even use base R straight up although I wouldnt recommend it.
We will use geom_map function to make map with ggplot2. Converting the data frame to a sf object allows to rely on sf to handle on the fly the coordinate system both projection and extent which can be very useful if the two objects here world map and sites are not in the same projection. P geom_polygon guidesfill FALSE.
Secondly we will use another transition related to the layers.
In this particular example were going to create a world map showing the points of Beijing and Shanghai both cities in China. The maps package isnt particularly accurate or up-to-date but its built into R so its an easy place to start. The principle of ggplot2 function is to combine different layers of the. The distinctive feature of the ggplot2 framework is the way you make plots through adding layers.
