This grammar point expresses a judgment or conjecture based on what one sees or perceives. It means 'it looks like...' or 'it appears that...'. Attach it to the masu-stem of verbs, the stem of i-adjectives (remove い), or the stem of na-adjectives (remove な).

見た目から判断して「〜そうだ」と推測する時に使います。動詞や形容詞に接続します。