What are the four reference points needed to calculate latitude

the center of the earth, the north and south poles, the equator and the Prime Meridian.

Explanation:

To obtain a precise latitude, map makers use 4 universal well-known points of reference that make unanimity among the science community, to ensure consensus.

Those reference points are:

1.) the center of the earth: that is used to calculate the radius of the circles and the various angles to draw the latitude lines.

2). the north and south poles: since the latitude lines have to reach them, starting from the Equator.

3.) the equator: that's latitude 0, so it's a pretty important reference point.

4.) the Prime Meridian, as a perpendicular line for the latitude "rings" and other calculations.

And the same reference points are also used to calculate the longitudes as well.

for e2020. the answer would be some directions from the mountain range so we can find mt. whitney. to locate which direction is north, you should use a   compass. this would not only find mt. whitney, but also becuase of this long paragraph you would get points because it's not like anyone actually reads your work becuase once they read the first sentence it sounds dumb enough to not read becuase i'm not good at answering this but the answer is compass for your benefit.

for e2020 ; -;