Narratives in A Map of Salt and Stars

There are two main narratives in A Map of Salt and Stars: the story of Nour's family fleeing the Syrian Civil War and the story of Rawiya, an apprentice to the famous historical cartographer Al-Idrissi. How are these narratives connected? What common elements do you see between them? How do they speak to, inform, or reflect one another? Why do you think Joukhadar structured her book around these two separate stories?