28 Sep
2021
28 Sep
'21
10:59 p.m.
If someone wants to help debug this, you can do conversion from grid to lat/long using Helmert here (note, use SH 00000.000000 00000.000000 format with several decimal places to avoid it using the middle of a grid square): http://www.howtocreate.co.uk/php/gridref.php
ARGH! I should take my own advice. Ignore me. I was never here. (Therion is doing just fine. It has a 2-4 mm discrepancy, but I think that is not something to worry about. Probably rounding errors accumulating.) Think I am going to crawl back into a hole.