横向
1
Visual representation of an area
4
Total number of people in an area
5
Physical features of land
8
Deep narrow valley with steep sides
9
Flat grassland in tropical regions
纵向
2
Long-term weather patterns of an area
3
Largest ocean on Earth
6
Seasonal heavy rainfall
7
Line dividing two countries
10
Low area between mountains
11
Large natural stream of water