How to make earth surface 3D map like this picture

Questions
1

How to make earth surface 3D map like this picture.

Image From ScratchyCAD

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12700×1266 353 KB

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The quick way is to use a use a strm heightmap as a displacement map on a SphereGeometry.

const sphereGeometry = new THREE.SphereGeometry(1, 720, 360);
const material = new THREE.MeshPhongMaterial();
const texture = new THREE.TextureLoader().load("img/worldColour.5400x2700.jpg");
material.map = texture;
const displacementMap = new THREE.TextureLoader().load("img/srtm_ramp2.world.5400x2700.jpg");
material.displacementMap = displacementMap;
material.displacementScale = .1;

Or use a gebco bathymetry image if you also want the ocean floor.

image
image1920×1080 482 KB

Alternatively, you can create a model at various resolutions in this Blender course.
https://sbcode.net/topoearth/
and then export the model as obj, gltf, etc, or what ever suits your use case.

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Thank you !