I have no idea how to get the world map, or the longitudinal or latitude lines "etched"
Bump Mapping or Displacement will do it.
The thing you need to look at is uv mapping. Basically you "unwrap" the spehere into a 2d layout (a globe is a good example think of a flat map on a wall). You then apply the map to your geometry through a shader and the map will be placed on the sphere. Look through the manual for some basic mapping tips.
it's a little hard to get your head around at first but once you do it's easy.
A
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