For many people, the Earth as they know it is heavily informed by the Mercator projection – a tool used for nautical navigation that eventually became the world’s most widely recognized map.
Mercator’s Rise to the Top
With any map projection style, the big challenge lies in depicting a spherical object as a 2D graphic. There are various trade-offs with any map style, and those trade-offs can vary depending on how the map is meant to be used.
In 1569, the great cartographer, Gerardus Mercator, created a revolutionary new map based on a cylindrical projection. The new map was well-suited to nautical navigation since every line on the sphere is a constant course, or loxodrome.
Geographic Inflation
The vast majority of us aren’t using paper maps to chart our course across the ocean anymore, so critics of the Mercator projection argue that the continued use of this style of map gives users a warped sense of the true size of countries – particularly in the case of the African continent.
Mercator’s map inadvertently also pumps up the sizes of Europe and North America. Visually speaking, Canada and Russia appear to take up approximately 25% of the Earth’s surface, when in reality they occupy a mere 5%.
Greenland, which appears as a massive icy continent in Mercator projection, shrinks way down. The continent of Africa takes a much more prominent position in this new, correctly-scaled map.
Despite inaccurate visual features – or perhaps because of them – the Mercator projection achieved widespread adoption around the world. This includes the classroom, where young minds are first learning about geography and forming opinions on relationships between countries.
Getting Reacquainted with Globes
Google, whose map app is used by approximately 150 million people per month, recently took the bold step of overlaying their map onto a globe. This change sidesteps projection issues completely and displays the world as it actually is: round.
Greenland’s projection is no longer the size of Africa.
– Google Maps team
As people become more accustomed to equal area maps and seeing the Earth in its spherical form, misconceptions about the size of continents may become a thing of the past.
