This section provides free geodetic Windows software for download.

On this page

Check the conditions for downloads. Alternatively, check online conversions or other LINZ datasets, downloads and software.

SNAP & CONCORD downloads

SNAP is a programme for adjusting the coordinates of stations in a survey network to best fit the observed data. CONCORD is part of the SNAP software suite, and converts coordinates between New Zealand coordinate systems. more...

NZ Map Reference Converter

New Zealand Map Reference Converter (NZMapConv) is a programme for converting map references between the old NZMS260 map series and the new NZTopo50 map series. It can also be used for converting between other common projections and datums. more...

New Zealand Transverse Mercator 2000

NZGD2000 - NZTM2000 source code

NZTM (ZIP 4KB)
Source code in the C programming language for converting NZGD2000 to NZTM2000 projection. 
Last updated 22 February 2007.

New Zealand Map Grid

NZGD1949 - NZMG source code

NZMG (ZIP 3KB)
Source code in the C programming language for converting NZGD1949 to NZMG projection. 
Last updated 22 February 2007.

New Zealand Geoid 2009

NZGeoid09 is available for download in two formats, covering four different spatial extents:

  • the entire computation area (160° E - 170° W; 25°S - 60°S)
  • New Zealand (165° E - 180° E; 34°S - 48°S)
  • the North Island (172° E - 179° E; 34°S – 42°S)
  • the South Island, Stewart Island / Rakiura (166° E - 175° E; 41°S - 48°S).

NZGeoid09 - Full computation area - ASCII grid

Last updated 21 September 2009 

NZGeoid09 - Full computation area - coordinate triplets

NZGeoid09 - New Zealand - ASCII grid


Last updated 21 September 2009 

NZGeoid09 - New Zealand - coordinate triplets


Last updated 21 September 2009 

NZGeoid09 - North Island - ASCII grid


Last updated 21 September 2009

NZGeoid09 - North Island - coordinate triplets


Last updated 21 September 2009

NZGeoid09 - South Island, Stewart Island/Rakiura - ASCII grid


Last updated 21 September 2009

NZGeoid09 - South Island, Stewart Island/Rakiura - coordinate triplets


Last updated 21 September 2009

New Zealand Geoid 2016

Information on how to download NZGeoid2016:

New Zealand Quasigeoid 2016 (NZGeoid2016)

See our Medium blog for more information on how to use NZGeoid2016 to reproject point clouds:

Reprojecting point clouds to NZVD2016

NZGD1949 & NZGD2000 horizontal coordinates distortion grid

Download the distortion grid file and other information available regarding the grid transformation.

ASCII version of the distortion grid


Last updated 20 November 1999. 

NZGD2000 - NZGD1949 source code

Last updated 4 February 2014.

Source code in the C programming language that implements the conversion between NZGD2000 and NZGD1949 using the NTv2 ASCII distortion grid file.

This code can be incorporated into custom software. Two files are provided - linzgrid.c and linzgrid.h. Comments in the linzgrid.c file detail how it is used. To use this you will also need to download the ASCII version of the distortion grid.

con_check software download

con_check is used by the National Geodetic Office (NGO) for quality assurance and validation of contracted Geodetic Deliverables. This tool has been developed for in-house processing and is unsupported by LINZ. con_check and the content of this guideline is provided to NGO contractors for information only, it has not been specifically customised for use outside of the LINZ network.

con-check (ZIP 5MB)

Last updated 24 Oct 2014. 

Conditions for downloads

Download and use of these software applications is taken to be acceptance of the following conditions:

  • Land Information New Zealand (LINZ) does not offer any support for this software.
  • The software is provided "as is" and without warranty of any kind. In no event shall LINZ be liable for loss of any kind whatsoever with respect to the download, installation and use of the software.
  • The software is designed to work with MS Windows. However, LINZ makes no warranty regarding the performance or non-performance of the software on any particular system or system configuration.
 

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