Thank you for putting all that together for me, but unfortunately I had the wrong name. I need to make it from a height map, not a bump map. Should I use displacement? I don't want to create the illusion of depth, I want the mesh to actually change. Here's a height map I found, though I need one that has the ocean floor too.

https://earthobservatory.nasa.gov/Fea....5400x2700.jpg