natural earth - SERP Analysis

https://www.naturalearthdata.com/

https://pro.arcgis.com/en/pro-app/latest/help/mapping/properties/natural-earth.htm

https://en.wikipedia.org/wiki/Natural_Earth

http://shadedrelief.com/ne-draft/

https://github.com/nvkelso/natural-earth-vector

https://gisgeography.com/natural-earth-data-free-gis-public/

https://guides.library.uwm.edu/c.php%3Fg%3D567847%26p%3D3914096