What are the coordinates along the central meridian?

Answer 1

Well, let's see . . . . .

A "meridian" is a line of constant longitude, so wherever you are on it, the longitude is

always the same number.

Also, a meridian of longitude is a line that stretches all the way between the north pole

and the south pole, covering all possible latitudes.

So the coordinates on the central meridian are:

(Any latitude you want), and (The same longitude everywhere on it).

Answer 2

The coordinates along the central meridian are determined by the latitude of each point. For example, at the equator, the central meridian has a latitude of 0 degrees and the coordinates would be (0, longitude).