Exactly the same as the reason for marking numbers on houses, and then adding numbers
to the street-name signs where streets intersect.
It establishes a system for telling other people where you're located, and for navigating
from where you are to where you want to be.
It was to pinpoint a certain location accurately on Earth.
so that people could find the exact place on the planet that they want.
The lines were devised by evenly diving the areas of a circle and assigning them a given value, usually expressed in degrees.
Each 'meridian' is a line of constant longitude.
Lines of latitude and longitude allows any position on the Earth to be plotted.
longitude
Most maps will show latitude and longitude lines, if not, they're ALWAYS on a globe.
Lines of latitude and longitude allow a specific point to be located any where on the world.
John Harrison
latitude?
lines of latitude
Each 'meridian' is a line of constant longitude.
Latitude.
Every meridian of longitude is perpendicular to every parallel of latitude, and every parallel of latitude is perpendicular to every meridian of longitude.
The lines that intercept latitude lines are lines of longitude.
Latitude and longitude
Lines of Longitude
Longitude lines go vertically and latitude lines go horizontally.
Every parallel of latitude crosses every meridian of longitude.
Lines of latitude and longitude allows any position on the Earth to be plotted.