For the same reason there are numbers on the front doors of houses.
The system of latitude and longitude angles gives every point on Earth an 'address'
of two numbers. They tell exactly where the spot is, and make it possible to find
that exact spot, even if there's nothing there, and nothing but water for a thousand
miles around it in every direction.
We use longitude and latitude when looking at a map to calculate time.
The lines of longitude on a map goes from north-south
on a map
London
Use the latitude and longitude lines on the map along with the coordinates. Find where the two coordinates meet and that will be the location you are looking for.
Latitude and longitude are able to pinpoint a certain location on Earth accurately on a map.
We use longitude and latitude when looking at a map to calculate time.
The lines of longitude on a map goes from north-south
Latitude and Longitude map
Latitude and longitude
Lines of longitude and longitude
Longitude measures distances east or west on a map.
Longitude lines go up and down on a map.
The cartographer, publisher, or printer of the map does that.
That's the vertical lines.
By Longitude and Latitude
on a map