I don't understand the meaning of the sentence.
After all a map only has a tiny bit of "edge" but plenty of "middle" in which your destination could be situated. Or has it?
1. What does "Or has it" mean?
2. What does "Or" mean?
3. Why "has" is used here?
4. What does "it " refer to?
5. When and how to use such a sentence pattern?