Rで地域メッシュ地図を描く How to create grid maps in R
詳細は以下の記事を参照。Further explanation provided in the articles below (in Japanese).
https://ehime-wbsj.com/reports/2024/02/r_choropleth_1/
https://ehime-wbsj.com/reports/2024/02/r_map_mesh_grid/
https://ehime-wbsj.com/reports/2024/03/r_map_paginate_loop/