Download Geodetic Software

This section provides free geodetic Windows software for download. 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

• LINZS25002 - Standard for New Zealand Geodetic Datum 2000 Projections
• LINZG25702 Projections fact sheet - a summary of the requirements of NZTM2000

New Zealand Map Grid

• Lands and Survey Technical Circular 1973/32 (pdf 230KB)

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).

NZGD1949 & NZGD2000 horizontal coordinates distortion grid

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

• LINZS25000 - Standard for New Zealand Geodetic Datum 2000
• LINZG25700 Fact sheet - a summary of the key information in LINZS25000
• GD2000it is the software that LINZ provides to convert coordinates between NZGD1949 and NZGD2000 using 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.

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.