Learn how to convert Topo50 coordinates to other projections.

The projection and datum used to produce Topo50 and Topo250 maps is the New Zealand Transverse Mercator 2000 (NZTM2000) projection; and the New Zealand Geodetic Datum 2000 (NZGD2000). 

These are different to the pre 2009 topographic map series, NZMS260 and NZMS262, which were produced using the New Zealand Map Grid (NZMG) projection and the New Zealand Geodetic Datum 1949 (NZGD1949) datum.

Find out more about the New Zealand Map Grid

Find out more about the New Zealand Geodetic Datum (NZGD1949)

Converting coordinates

Basic conversions - to convert individual coordinates between commonly used datums and projections (including those used in the Topo50 and NZMS260 maps), you can either:

Detailed conversions - to convert coordinates between a wider range of datums, projections and height systems, and make use of format options such as bulk conversions, you can either:

Note: Using these detailed tools requires a working understanding of coordinate and height conversions.

Service disruption

Over the last couple of days the server that runs the Geodetic Database and the Online Coordinate Converter has become unstable. As a result the server has to be rebuilt. We are working to do this as quickly as possible. In the meantime you can use these alternate links:

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