Why are the n, s, e, and w designations often omitted from coordinates on u. s. topographic maps?

In a Topographic map,  here are the programming values of each of that navgations:

N = positive value to the latitude
S= Negative value to the Latitude
W = Positive value to the longitude
E = Negative value to the longitude

Most programmers that work to create the topographic map choose to simply ommit the N,S,W,&E because it will save them a lot of time from having to type in a minus sign before most of their longitude values in code writing.

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).