Usage patterns
〈場所〉方面bound for/heading toward the direction of a place
This train is heading toward Shinjuku.
〈事〉方面に詳しいto be knowledgeable in a certain field
He's knowledgeable in the field of computers.
〈場所〉方面に向かうto head in the direction of a place
The typhoon is heading toward the Kanto area.
その方面ではin that particular field/area (of expertise)
In that field, he's the leading authority.