I want to test the ability of students to read a passage and answer questions about it. Could you please come up with a good question for the passage "The BeiDou-2 system began offering services for the Asia-Pacific region in December 2012. At this time, the system could provide positioning data between longitude 55°E to 180°E and from latitude 55°S to 55°N."?
A:
What are the North to South measurements called