The horizontal (left-right) dimension is called longitude. The vertical (top-bottom) is called latitude. However, I'm not sure how to adjectivize and adverbize those terms.
The best shot expressing the meaning I can think of is "latitude-wise" for the vertical case. Here, I have two questions.
Is there a more sophisticated term for that? And if not...
What is the most recommended way to express the work-around of mine?
a. latitude-wise
b. latitudewise
c. latitude wise
d. latidudelly
e. lati-what-ever-else-combo-might-be-conceiveable
Of course, the same wonderings go for the horizontal dimension, i.e. "longitude-wise". However, I'd be strongly surprised if it differed in principle from the vertical one.
Top
on the map isNorth
on the territory mapped, nor that parallels and meridians are consistently marked or even useful.