Author here, I wrote this to show how you can use the rayshader package to generate 3D maps in R using free and open data (in this case, Landsat 8 imagery and SRTM elevation data). You can check out rayshader's Github repo here:<p>Github:
<a href="https://www.github.com/tylermorganwall/rayshader" rel="nofollow">https://www.github.com/tylermorganwall/rayshader</a><p>And browse the documentation (with rendered examples) and README on its website:
<a href="https://www.rayshader.com" rel="nofollow">https://www.rayshader.com</a>