Correction for the size of Christchurch
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How big is 17,900,000 square perches?
It's about three-fourths as big as Christchurch
The size of Christchurch is about 24,000,000 square perches.
(a.k.a Ōtautahi) (urban area) (New Zealand)
Ōtautahi Christchurch, New Zealand's gateway to Antarctica, measures 24,000,000 square perches in total area.