[R-sig-Geo] How to do an anamorphosis on R?

[Gilles Benjamin Leduc]

Hi all, 

I would like to make an anamorphosis map, id est, a map where some other distance measurement are used instead geographical distance. In my case I would like to plot an anamorphosis of Iceland using genetical distence insteand of geographical distence. 
I have got .shp maps and equivalents. 
How to make such a distortion? 
Best regards 
Benjamin