👉 In geography, a premeridian is an axis of longitude that runs through the center of a large continent or ocean. It's where the equator and the parallels intersect. The premeridians are usually marked on maps by a vertical line called the "longitude line," which shows the position of the sun at different latitudes on the Earth. For example, if you look at a map of Europe, you'll see that the premeridian runs through the middle of Europe and marks the
