The Problem With Flat Maps

Flat maps don't actually represent the world accurately. They can't. You're taking a sphere and squishing it into a rectangle. Something has to give.

The most common map projection is Mercator, which is what Google Maps uses. It's great for navigation in cities. Terrible for understanding long distances. It distorts the poles especially. Antarctica looks huge. Greenland looks like it's the size of Africa (it's not).

On a flat Mercator map, the shortest line between two points actually looks curved. Confusing, right?

The Real Shortest Path

On a sphere, the shortest path between two points is called a great circle. It's the circle you get if you take a plane and slice it through the center of the sphere.

This path curves. It looks weird on a flat map. But it's actually the straight line on a sphere.

Aircraft follow this path (approximately). It's the fuel-efficient route. Shorter distance means less fuel, less cost, less time.

What This Looks Like in Practice

Sydney to London. You'd think you'd fly west, right? Straight across the Indian Ocean and Africa.

Nope. The shortest path goes up and over Asia. The flight path goes north and west, which looks weird on a flat map. But on a globe, it's the straight line.

Same with long Pacific flights. They go way further north than you'd expect. A flight from Australia to North America will go north through the Pacific, not straight across.

If you're flying from London to Tokyo, you go north across Russia. Seems wrong. It's actually the shortest path.

Why This Matters (Practically)

Fuel. Time. Cost. All connected.

Airlines save millions flying the great circle route instead of what looks like the straight line on a map. Every thousand kilometers saved is fuel saved.

That's why routing matters. That's why the path looks curved even though it's actually straight.

Seeing It Properly

The best way to understand this is to look at a globe. When you see your flight routes on an actual 3D sphere, the curves make sense. They're straight lines on the sphere.

Jetmap lets you switch to Globe view for this reason. You can rotate the globe and see your routes as they actually are.

Compare that to Mercator view and suddenly the curved lines make sense. The globe shows you the truth.

The Fun Part

Once you understand this, you start noticing patterns. All your long-hauls curve the same direction. Australian flights going north always curve that way. It's not magic. It's geometry.

You also start appreciating the routes more. That curve over Russia isn't inefficient. It's elegant. It's the actual shortest path.

Next time you're on a long-haul flight, check the moving map. You'll see it following exactly this path. It looks curved on their Mercator map. But it's straight on the actual globe.

And now you know why.