In set-up, the options for rolling the D6 should be: 1-3 for
earthscape 10 or 12, and 4-6 for
earthscape 9 or 16. Alternatively, if it is easier to remember, simply re-roll if you roll a 1 or 2 and use the 3-6 results as printed. The top option, giving
earthscape 13 or 14, should not be used, as those earthscapes are part of the map already and not meant to be repositioned.