Davis Networking

GPS, Mapping and GIS Consultancy and Training

Davis Networking can offer consultancy in a variety of areas relating to GPS, Mapping and GIS.

With the release of the new Topo50 map series based on the NZGD 2000 Datum and NZTM Grid system on the 23rd September 2009 there has been a lot of interest and confusion relating to using older GPS's with the new maps.

While using WGS84 as a substitute for NZGD2000 works well and is close enough for all practical applications, the change from NZMG to NZTM is a completely different story.

In general recent GPS's receivers from Garmin will have support for NZGD 2000 as the Datum and NZTM as a Coordinate System, or some will be upgradeable to do so, older units will not.

However all is not lost, most older Garmin GPS receivers can be made to work with the new map system.

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For enquiries please send to or fax to (03) 343 0461 Davis Networking


Home Page: http://davisnetworking.co.nz

Email:

Phone: NZ+64 3 980 6389 Fax: NZ+64 3 343 0461

Postal address: P O Box 120, Christchurch Mail Centre, Christchurch 8140