1. Do you want to know more?
(What is the part of speech of 'more'? Is it an adjective or an adverb?)
2. Look at this map of Dokdo.
3. Look at this map of Dokdo's.
4. Look at this Dokdo's map.
(Dokdo is a small island. Which one is right? #4 is incorrect. What about the others? Which one is correct?)
In this sentence, "more" is a noun, the direct object of the verb "know."
2 is the only correct sentence.