To produce our Topo250 maps of the New Zealand mainland we use:
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the New Zealand Geodetic Datum 2000 (NZGD2000)– the coordinates of longitude and latitude
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the New Zealand Transverse Mercator 2000 (NZTM2000) projection – this lets us show the curved surface of the Earth on a flat sheet of paper.
To produce our Topo250 maps of the Chatham Islands we use the Chatham Islands Transverse Mercator 2000 (CITM2000) projection.
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