Vaxholm Municipality ("Vaxholms kommun" or "Vaxholms stad") is a municipality within Stockholm archipelago in Stockholm County in east central Sweden. The municipal slogan is "Vaxholm – the capital of the archipelago", due to its central location in the archipelago. Its seat is located in the city of Vaxholm.
The location of the Vaxholm Municipality could never be considered as on the southern edge of the Stockholm archipelago.
The info states it is central, so it can't be on the southern edge. It's difficult because I used different words from the info.