[R-sig-Geo] dissolve internal borders of polygons using st_union and group_by

Marta Rufino m@rt@@m@ru||no @end|ng |rom gm@||@com
Thu Oct 17 17:47:47 CEST 2019

Thank you very much to all :)

Barry+Roger contributions sorted the problem for the moment, although in my
mind there are still things to be understood.
Mike, yep, thank you for alerting me of rnaturalearth issues- I was not
aware of it. In this case, I am really interested in the process to
apply in other polygons, not in the data *per se*, but will take this into
account in the future.

Once I have the doc produced (distribution of world
estuaries/bays/transition waters), I will post on the list :)

Best wishes,

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