[philippoi]

Just to point out, Copenhagen isn't (entirely) located on Amager, as the article suggests. Part of it is, but that's only a couple of neighborhoods in the city which is composed of 8-ish distinct areas. Copenhagen is located entirely on Sjælland, but calling it Sjælland Bakke wouldn't make sense in the local context.

[jVinc]

And for further social context, they are essentially saying what for a Dane is the equivalent of "New York is located in New Jersey".

[SahAssar]

No, it's more like "New york is located in Brooklyn". As in, Amager is still a part of Copenhagen, but does not encompass all of it.