Download Geodetic Software

This section provides geodetic Windows software for download on an as-is basis:

SNAP & CONCORD downloads

SNAP is a program 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...

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
• "C" language source code (zip 4KB) for converting NZGD2000 to NZMG2000 projection

New Zealand Map Grid

• Lands and Survey Technical Circular 1973/32 (pdf 230KB)
• "C" language source code (zip 4KB) for converting NZGD1949 to NZMG projection

New Zealand Geoid 2005

NZGeoid05 is available for download in two formats. These grids cover the entire computation area (160° E - 170° W; 25°S - 60°S):

• NZGeoid05 ASCII grid (zip, 2.4MB)
• NZGeoid05 coordinate triplets (zip, 5.1MB)

NZGD1949 & NZGD2000 horizontal coordinates distortion grid

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

• "C" language source code for implementing the transformation (zip 8KB)
• Distortion grid file in NTv2 ASCII format (zip 285KB)
• GD2000it converts coordinates (latitude and longitude) between NZGD1949 and NZGD2000 using the transformation distortion grid.
• LINZS25000 - Standard for New Zealand Geodetic Datum 2000
• LINZG25700 Fact sheet - a summary of the key information in LINZS25000