A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David C
Date: 2021 Dec 10, 23:45 -0800
I guess tha other issue, which was significant in Australia where I used to live, is the measurable continental drift which I think has forced a couple of revisions to the grid system there.
An interesting subject. Sometimes I think that I ujnderstand it; other times I do not!!!!
The NZ Geodetic Datum 2000 is a fixed plate datum. The coordinates of a locality are fixed. In contrast WGS84 is fixed to the earth and consquently the coordinated of points in NZ are continuously changing.