A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: David C
Date: 2021 Jun 29, 14:37 -0700
The "longitude before latitude" format is common in astronomy. For example, see the Astronomical Almanac list of observatory coordinates and the JPL Horizons online calculator.
The long before lat format may also be common in surveying. In an explanation of how to define a location on a NZ topo map it states that geographical coordinates are to be given in lat, long order. However grid coordinates are to be given as easting, northing. Of course these days it is unlikely that somene seeking help would give a grid reference - instead they would quote what was displayed on their phone gps.