![]() ![]() NZMG is formally defined in Reilly WI (1973) A Conformal Mapping Projection with Minimum Scale Error. More information about converting coordinates between the NZTM2000 and NZMG projections is available on the coordinate conversion pages. Similarly, it is not possible to have NZMG coordinates in terms of NZGD2000 and vice versa. This means that the transformation of coordinates between the two projections is not a straight forward process. The NZMG is based on the NZGD1949 datum, whereas NZTM2000 is based on NZGD2000. This has the advantage of exhibiting minimal scale distortion over New Zealand however it is a projection unique to New Zealand and so can be difficult to use or program into computer software or positioning devices (eg, GPS receivers). Instead it uses a complex-number polynomial expansion. Coordinate Plane-Plot the coordinate - Coordinate Grid - Coordinate Points. In geometry, coordinates say where points are on a grid we call the 'coordinate plane'. Unlike NZTM2000, NZMG is not based on a geometric projection (transverse Mercator is based on a cylinder). Europe - Reading a Map Grid - Drag the grid coordinate to the matching object. This projection was used to produce the existing series of NZMS260 1:50,000 topographic maps (with the exception of the Chatham Islands). ![]()
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