# 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

"Mount Zion gives joy to everyone on earth" or "everyone on earth rejoices because of Mount Zion" 

# 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.