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Context
What happened: President Donald Trump renamed Lake Ontario to Lake America by executive order. US agencies updated federal documents, and Google and Apple changed the name on US maps. Canada's Royal Canadian Geographical Society refused to adopt it.
Key numbers: Aug. 27 order gave agencies 30 days to update documents.
Why it matters: The split name puts cartographers in a quandary, since the lake straddles the Canada-US border and no binding international standards resolve naming disputes. The UN names group meets in Austria in mid-October.