What Is Latitude and Longitude?

An Address for Every Point on Earth

If someone says "meet me at 40.7° North, 74.0° West," they're giving you the exact location of New York City using latitude and longitude — the coordinate system that covers the entire globe. Just like a street address tells a mail carrier exactly where to deliver a letter, latitude and longitude tell you exactly where any place is on Earth, whether it's a city, a mountain peak, or a spot in the middle of the ocean.

Latitude — How Far North or South

Latitude lines run horizontally around Earth, like belts. They measure how far north or south you are from the Equator — the imaginary line that divides Earth into the Northern and Southern hemispheres. The Equator is 0° latitude. The North Pole is 90° North, and the South Pole is 90° South. Every place on Earth has a latitude between 0° and 90°, either north or south of the Equator.

An easy way to remember: think of latitude as a ladder — the "rungs" go side to side, and you climb up (north) or down (south).

Longitude — How Far East or West

Longitude lines run vertically from the North Pole to the South Pole. They measure how far east or west you are from the Prime Meridian — the 0° line that passes through Greenwich, England. Longitude ranges from 0° to 180° East and 0° to 180° West. The line at 180° (on the opposite side of the globe from the Prime Meridian) is the International Date Line, where the calendar changes by one day.

Memory trick: longitude lines are long — they stretch the full length of the Earth from pole to pole.

Putting Them Together

Every location on Earth can be described with two numbers: a latitude and a longitude. For example, the Statue of Liberty is at roughly 40.69° N, 74.04° W. The Great Pyramid of Giza is at 29.98° N, 31.13° E. By combining one horizontal and one vertical line, you get a precise intersection — a single point on the map. This is exactly how GPS (Global Positioning System) works: satellites in space calculate your latitude and longitude to guide you on your phone's map app.

Special Lines to Know

Several latitude lines have special names. The Tropic of Cancer (23.5° N) and Tropic of Capricorn (23.5° S) mark the boundaries of the tropics — the zone where the Sun can be directly overhead. The Arctic Circle (66.5° N) and Antarctic Circle (66.5° S) mark the regions where the Sun can stay up for 24 hours straight in summer or disappear entirely in winter. These lines exist because Earth's axis is tilted 23.5° relative to its orbit around the Sun.

Why This Matters

Latitude and longitude give every point on Earth a unique address. Just as a street address tells you exactly where a house is in a city, coordinates tell you exactly where any point is on the planet. GPS, aviation, shipping, military operations, weather forecasting, and emergency rescue all depend on this coordinate system. Understanding latitude and longitude is the gateway to map reading, navigation, and geographic information systems (GIS) — one of the fastest-growing technology fields.

Latitude and longitude also teach how math describes the physical world. The system uses degrees of a circle to measure position — connecting geometry to geography in a way that makes both subjects more meaningful. Understanding that the equator is 0° latitude and the poles are 90° reveals why math and measurement matter beyond the classroom.

Where Kids Get Stuck

The most persistent confusion is mixing up latitude and longitude. Both are measured in degrees, both appear on the same map, and their names don't intuitively suggest which is which. Mnemonics help: "latitude = ladder" (horizontal rungs going up), longitude = "long" (lines running the long way from pole to pole). Another trick: latitude lines are "flat" (like the "lat" in "flat").

Another challenge is understanding why longitude needs a prime meridian. Latitude has a natural zero (the equator — the widest point of Earth), but longitude has no natural starting point. The prime meridian through Greenwich, England, was chosen by international agreement — a fact that surprises children and opens a discussion about how human decisions shape our measurement systems.

Students also struggle with reading coordinates that include degrees, minutes, and seconds. The notation 40°44'54" N looks complex. Starting with decimal degrees (40.748° N) and introducing DMS notation later reduces the initial cognitive load.

Try This at Home

• Coordinate treasure hunt — Use a GPS app or online map. Give your child coordinates of interesting locations (their school, a landmark, a park) and have them identify each place.
• Global coordinate game — Look up the coordinates of famous landmarks (Eiffel Tower, Statue of Liberty, Great Wall of China). Plot them on a world map and see the pattern of where they cluster.
• Latitude and climate — Compare the latitude of your city to other cities. Are cities at similar latitudes similar in climate? Why or why not?
• Grid map practice — Create a grid on graph paper, label the axes with coordinates, and plot points to create a picture. This connects coordinate geometry to geography.

For more ideas, see our guide: Teaching Kids About Maps.

📍 Explore Latitude & Longitude

Last reviewed: May 2026