Question

How do latitudes and longitudes help in locating a point ? Why is only one of them insufficient in doing this ?

Answer 1

Longitude and latitude is the basic coordinate system and each coordinate only occurs once, unlike a UTM projection. 

To find the N/S everything is based off of 0 which happens to be the equator. If you are north of the equator you are ºN, if you are below the equator, you are in º. 

For E/W everything is based off the Prime Meridian. If you are west of the Prime Meridian you are ºW if you are east of the Prime Meridian, you are ºE. 

As such, you will always know where you are as each coordinate is unique.....

Answer 2

Answer:

Latitudes and longitudes form a grid. The coordinates of latitude and

longitude gives us the location of a place.

Two different points may lie on the same latitude or the same longitude.

But there exists only one point where latitude and longitude intersect.