Mastering Map Zooming and Cropping in R Using Raster, Maps, and ggmap Packages

Changing Geom_point Colors Depending on Data in R: A Step-by-Step Guide

Sorting Legend Order in ggmap: 3 Approaches to Customization

Understanding ggmap and ggplot2 Maps with Point Legends: A Comprehensive Guide to Creating Informative Geospatial Visualizations

Adding Legend/Text Table to ggmap with Multiple Layers