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The geographical "centre of New Zealand" allegedly lies in Nelson; on a hilltop near the centre of the city. This is the point "zero, zero" from which the first trigonometrical surveys were started in the 1870s by John Spence Browning, the Chief Surveyor for Nelson. From this 360 degree viewpoint, the zero, zero points in neighbouring geodetic survey regions (including Wellington in the North Island) could be triangulated and a better survey of the whole of New Zealand constructed.
