en_tn_condensed/psa/048/002.md

Beautiful in elevation

"Beautiful and high." The word "elevation" refers to how high mount Zion is.

the joy of the whole earth, is Mount Zion

Here the word "earth" refers to everyone living on the earth. The word "joy" may be translated as a verb. Alternate translation: "Mount Zion gives joy to everyone on earth" or "everyone on earth rejoices because of Mount Zion" (See: rc://en/ta/man/jit/figs-metonymy and rc://en/ta/man/jit/figs-abstractnouns)

on the sides of the north

Possible meanings are that this phrase 1) refers to the direction of the north or 2) is a proper name, Zaphon, referring to a mountain in the north.