Notation for latitude and longitude is easy and people should stop being annoyed by it.

Simply use order (either the lat, lon convention or the lon, lat convention).

If you need cross-linguistic symbols for an equation, use the Greek letters (either the θ = latitude, φ = longitude convention or the θ = longitude, φ = latitude convention).

Personally, I find it clearest to just abbreviate them, so l = longitude and l = latitude.

@vruba Why not just follow the convention of always putting the smaller number first?

@kgjenkins This approach has much to recommend it. You could also save space by adding them.

@vruba Always be sure to alphabetize your what-three-words, or simply rearrange them into an anagram.