What are different types of projections out there oblique and what?

A straight-looking road on a map may actually bend around the Earth. To draw it flat, we need a projection. Different projections distort different things — so which one should you trust, and what does 'oblique' mean? Think of the globe as the town square.

Three roads run out to a cylinder, a cone, and a flat plaza. Each one wraps the globe, then unrolls onto a flat map. We'll follow every road in turn — and when a road comes in at an angle, that's an oblique projection. At its core, a projection is any method for flattening the 3D world onto a 2D surface — and oblique is just one of the ways to do it.

Imagine a small building and the road it sits on. A projection is just a rule for moving every point of the building onto the road. Let's use one corner of the roof. We send that point along a line until it touches the road.

If the line drops straight down, the drawing keeps its true shape: that's orthographic. Now send the same point along a slanted line, like a low sun shadow. The point lands farther along the road, and the building stretches: that's oblique. Same building, same road, same point — the only thing we changed is the direction of the projection line.

Oblique means parallel lines travelling at a slant; orthographic means parallel lines travelling straight down. Here is another way to see it. Looking straight down at a building, you get only its footprint — just a square. But tilt your view, and the same building becomes a box.

You can see the roof and the wall together. That is what an oblique projection gives you: depth. So when you need to know how something sits in space, not just where it is, oblique is the better lens. Imagine a globe with roads and buildings.

To make a map, flatten it through a shape: cylinder, cone, or flat sheet, giving cylindrical, conic, or planar. Tilt the globe first: straight on is normal, sideways is transverse, anywhere between is oblique. No map is perfect; pick the projection that keeps what matters.