create simple world map

i would like to simplify a world map with light polylines.

I'm kind of started from voronoi cells which are not touching boundary using hoopsnakes component; however, I cannot control the cells on the boundary lines and also cannot put the each country into different branch. 

Does anybody have any idea how to simplify world map from base cad lines? 

My way is kind of complicated and might not the best solution. 

The purpose is to get the each country with simple light polylines in the different branch. 

donnie

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