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# Map Projections

## Lost in Null Island: The Curious Origin of 0,0

Null Island is an inside joke in the world of GIS. It’s actually a place that doesn’t exist in the world today but where data lands in error.

## Why Are Great Circles the Shortest Flight Path?

Airplanes travel along the true shortest route in a 3-dimensional space. This curved route is called a geodesic or great circle route.

## 50 Map Projections Types: A Visual Guide

If you’re in need of a visual reference guide to map projection types, this goldmine of the top 50 global map projections used by cartographers will help.

## Conic Projection: Lambert, Albers and Polyconic

When you place a cone on the Earth and unwrap it, this results in a conic projection. Examples are Albers Equal Area Conic and the Lambert Conformal Conic.

## Map Distortion with Tissot’s Indicatrix

Map distortion is best understood looking at Tissot’s indicatrix. It contains circles and shows how map projections distort shape, size and distances.

## Why Are Rhumb Lines (Loxodromes) a Constant Track Direction?

Rhumb lines (or loxodrome) have constant bearings and cross all meridians at the same angle. They are not the shortest distance between 2 points on a sphere

## Azimuthal Projection: Orthographic, Stereographic and Gnomonic

The azimuthal projection plots the surface of Earth using a flat plane. For example, common azimuthal projections are gnomonic, stereographic & orthographic

## Equal Area Projection Maps in Cartography

The equal area projection retains the relative size of area throughout a map. So that means at any given region, it keeps the true size and area of features.

## Cylindrical Projections in Cartography & Maps

When you place a cylinder around a globe and unravel it, you get the cylindrical projection like the Mercator, Transverse Mercator and Miller projections.

## How Map Projections Work

The best way to represent the Earth is with a globe. But map projections can be awfully useful too. Find out why cartographers use map projections in GIS.