[me2i81]

The most common error I've seen in this area is that most GIS systems use (Lat, Lng) but most systems written by non-GIS people use (Lng, Lat), which they think of as (x, y).

[iudqnolq]

I think you have that backwards? In my very limited experience most GIS systems use ENU ordering (east, north up), and easting corresponds to longitude.

[hurrrrrrrr]

I think he has that correct. Ime it's split on east/north vs. north/east but wgs84 is very dominant with lat/lon.