The longitude and latitude of Ningbo are: east longitude 12 1.56, and north latitude 29.86. Which map of 1: 100 is included?

Correct answer: According to formula A = [Ф/4o]+1; B=[λ/6o]+3 1 (east), or b=30-[λ/6o] (west). A=[29.86/4]+ 1=8，B = 1 [ 10]。