New Maps and NZTM Grid/Projection

With the almost imminent arrival of the new Topo50 map series on the 24^th there have been a few people asking about setting up older GPS's for the new NZTM Grid that the new maps use.

There are a few documents etc around, but I have also put some notes together.

Have a look at http://www.davisnetworking.co.nz/nztm/ and the linked PDF file and let me know what you think.

If anyone comes across issues with specific models then let me know.