Mapping with R
Simple (and not so simple) examples of mapping data with R
You might also like https://git.soton.ac.uk/twr1m15/la_emissions_viz which drives https://rushby.shinyapps.io/LAemissions/
Resources
Openstreetmap for base maps (i.e. map tiles/rasters)
Google maps for base maps
They want you to have an API key now. Yeah nah.