What is the longitudinal extens ion of new zealand?

Answer 1

The Chatham Islands and the Kermadec Islands are possibly the extent in longitude - certainly for populated areas. The Antipodes would extend that but unpopulated.

However, the Cook Islands (Rarotonga) is the easternmost in the 'New Zealand realm', and Auckland islands in the west.

The latitudinal extent is much greater, extending from the Tokelau in the north, to possibly Scott Island in the south, and including the Auckland and Campbell islands. All essentially unpopulated (other than Tokelau). (there is a permanent DoC presence on the Kermadecs. ) Scott Island may be considered part of the Ross dependency, and as such, those territorial claims are frozen.