Lat Long or Long Lat

Question

There seems to be no standard whether Longitude,Latitude or Latitude,Longitude should be used. WSG84 and stuff based directly on it, seem to prefer Long,Lat.

\"Norm

Answer 1

You are correct, there is no standard on the order:

In mathematical functions which do an universal conversion, between x,y or lon,lat or inverse, the lon,lat order should be used, because the x-axis relates to longitude and y to latitude and the x,y order is ususally prefered.

Further, if you program a piece of code which is related to draw a lon,lat coordinate on x,y coordinates (screen), I also would use the lon,lat order because of the direct relation to x,y.

The order lat,lon is the classical one, coming from (old) navigation and geography. I assume that latitude in that field is used first because it was easier to measure (using only a ruler, the sun and a stick for length of shadow measuring). The longitude was not determinable for long time. If you read old adventure reports, they only tell the latitude that their expeditions reached).

I think therefore they use latitude first, the measurement of longitude came later in history, once precise chronometers have been available and transportable.

So for apps that display coordinates info on a screen you should display latitude first.