Using Shader Graph to Create RGB Gradient for Terrain on a Sphere

Hi everyone,

So, I've begun researching this and unfortunately I don't know what I don't know.

Heres the idea:

- I have a non-perfect spherical object that has some terrain. Craters, ridges, depressions, etc...
- I would like to create an RGB gradient digital terrain map of that sphere, where different elevations have a different color.

I believe this will involve vertex shading? In my head the idea is to calculate the distance between the center of the object, and a given vertex then apply the appropriate color to that vertex based on the distance.

Trying to accomplish this in Shader Graph has been a bit, over-whelming as I've stumbled upon tri-planar mapping, geometric shaders, vertex shaders, etc...

Would someone please point me in the right direction? Thanks!

*Worth mentioning that I'm using the URP.

**I've attached a photo of the basic idea that I'd like to accomplish, however the coloring in the photo is wrong as it looks like its probably shading along a global y axis, or using the bottom of the object as the origin rather than the center.