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Visualizing the Depth of the Great Lakes

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Visualized: The Depth of The Great Lakes

Click here to view the interactive version of the visualization on Tableau.

As the seasons change, it’s natural to want to enjoy the outdoors to the fullest. The Great Lakes, a distinct geographical region sandwiched between the U.S. and Canada, provides immense opportunity for millions of tourists to do just that every year.

But did you know that altogether the Great Lakes contain 21% of the world’s surface freshwater by volume—or 84% of the surface freshwater in North America?

This bathymetric visualization, created by Alex Varlamov, helps put the sheer size and depth of all five of the Great Lakes into perspective.

What is Bathymetry?

Bathymetry is the study of the underwater depth of ocean or lake floors, a geographical science that falls under the wider umbrella of hydrography.

In essence, it is the underwater equivalent of topography. Contour lines help to represent and study the physical features of bodies of water, from oceans to lakes.

Most bathymetric studies are conducted via sonar systems, transmitting pulses that ‘ping’ off the ocean and lake floor, uncovering what lies below.

The Depth of the Great Lakes, Compared

High on the list of the world’s largest lakes, the five Great Lakes altogether account for over 244,700 km² (94,250 mi²) in total surface area. That’s bigger than the entire United Kingdom.

Lake Superior emerges, well, superior in terms of total surface area, water volume, and both average and maximum depth.

Surface areaWater volumeAverage depthMaximum depth
Lake Ontario19,000 km²
(7,340 mi²)
1,640 km³
(393 mi³)
86 m
(283 ft)
245 m
(804 ft)
Lake Erie25,700 km²
(9,910 mi²)
480 km³
(116 mi³)
19 m
(62 ft)
64 m
(210 ft)
Lake Michigan58,000 km²
(22,300 mi²)
4,900 km³
(1,180 mi³)
85 m
(279 ft)
282 m
(925 ft)
Lake Huron60,000 km²
(23,000 mi²)
3,500 km³
(850 mi³)
59 m
(195 ft)
228 m
(748 ft)
Lake Superior82,000 km²
(31,700 mi²)
12,000 km³
(2,900 mi³)
147 m
(483 ft)
406 m
(1,333 ft)

Lake Erie is by far the shallowest of the lakes, with an average depth of just 19 meters (62 ft). That means on average, Lake Superior is about eight times deeper.

With that in mind, one drawback of the visualization is that it doesn’t provide an accurate view of how deep these lakes are in relation to one another.

For that, check out this additional visualization also created by Alex Varlamov, which is scaled to the same 20 meter step—in this view, Lake Erie practically disappears.

More than Meets the Eye

The Great Lakes are not only notable for their form, but also their function—they’re a crucial waterway contributing to the economy of the area, supporting over 50 million jobs and contributing $6 trillion to gross domestic product (GDP).

Together, the five Great Lakes feed into the Atlantic Ocean—and when we expand the scope to compare these lakes to vast oceans, trenches, and drill holes, the depth of the Great Lakes barely scratches the surface.

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Who Owns the Most Vehicles per Capita, by Country?

Here are the highest vehicles per capita by country as a growing global middle class is fueling car ownership rates around the world.

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This bar graph shows the number of vehicles per 1,000 people around the world.

Who Owns the Most Vehicles per Capita, by Country?

This was originally posted on our Voronoi app. Download the app for free on iOS or Android and discover incredible data-driven charts from a variety of trusted sources.

In 2020, there were 289 million vehicles in use in America, or about 18% of the global total.

With one of the largest car ownership rates worldwide, the number of U.S. cars on the road have more than doubled since the 1960s. But how does ownership compare to other countries, and who is seeing the fastest growth rates amid a rising global middle class?

This graphic shows vehicles per capita by country, based on data from the International Organization of Motor Vehicle Manufacturers (OICA).

Highest Car Ownership Rates Worldwide

Below, we rank countries based on the number of registered vehicles in use per 1,000 people, including both passenger cars and commercial vehicles as of 2020:

CountryNumber of Vehicles in Use
per 1000 Inhabitants
Average Annual Growth Rate
2015-2020
🇳🇿 New Zealand8693%
🇺🇸 U.S.8602%
🇵🇱 Poland7614%
🇮🇹 Italy7561%
🇦🇺 Australia7372%
🇨🇦 Canada7073%
🇫🇷 France7041%
🇨🇿 Czechia6583%
🇵🇹 Portugal6402%
🇳🇴 Norway6351%
🇦🇹 Austria6322%
🇬🇧 UK6322%
🇩🇪 Germany6272%
🇪🇸 Spain6272%
🇬🇷 Greece6171%
🇯🇵 Japan6120%
🇨🇭 Switzerland6041%
🇧🇪 Belgium5901%
🇳🇱 Netherlands5882%
🇫🇮 Finland5771%
🇸🇪 Sweden5441%
🇩🇰 Denmark5402%
🇮🇪 Ireland5403%
🇲🇾 Malaysia5356%
🇸🇰 Slovakia5133%
🇱🇾 Libya4904%
🇧🇬 Bulgaria485-1%
🇭🇷 Croatia4743%
🇸🇾 Syria4727%
🇭🇺 Hungary4634%
🇰🇷 South Korea4582%
🇷🇴 Romania4387%
🇮🇱 Israel4044%
🇷🇺 Russia3892%
🇧🇾 Belarus3871%
🇲🇽 Mexico3584%
🇹🇼 Taiwan3441%
🇦🇪 UAE3438%
🇷🇸 Serbia3304%
🇦🇷 Argentina3110%
🇹🇭 Thailand2775%
🇨🇱 Chile2461%
🇰🇿 Kazakhstan226-1%
🇨🇳 China22314%
🇹🇷 Türkiye2204%
🇧🇷 Brazil2141%
🇺🇦 Ukraine192-1%
🇮🇷 Iran1832%
🇿🇦 South Africa1761%
🇪🇨 Ecuador1523%
🇻🇪 Venezuela149-1%
🇩🇿 Algeria1443%
🇲🇦 Morocco1124%
🇨🇴 Colombia1111%
🇮🇶 Iraq1114%
🇵🇪 Peru884%
🇮🇩 Indonesia785%
🇪🇬 Egypt644%
🇳🇬 Nigeria565%
🇻🇳 Vietnam5017%
🇵🇭 Philippines383%
🇮🇳 India3310%
🇵🇰 Pakistan207%

Clinching top spot is New Zealand, a country known for its love of cars.

With nearly nine cars on the road to every 10 people, this figure is notably high considering that children make up about 20% of the population. The majority of cars are imported second hand from Japan thanks to a wave of deregulation in the 1980s along with the country being a major producer of right-hand drive cars.

The U.S. falls close behind, with a clear preference for trucks and SUVs. In fact, the Ford F-1 Series has been the best-selling vehicle in America for 42 consecutive years.

In Europe, Poland has the highest number of vehicles per person, but one of the lowest share of electric vehicles (EVs). While EVs make up nearly 16% of all cars in top-ranking country Norway, they comprise 0.1% in Poland. On average, EVs account for 0.8% of passenger cars in the European Union.

Driven by an expanding middle class, Vietnam has seen the fastest growth in ownership. Between 2015 and 2020, the motorization rate grew by an astonishing 17% each year. Additionally, China witnessed 14% growth while India’s vehicles per 1,000 people increased 10% annually over the period.

The Top EV Markets, by Country

As EV sales gain momentum, here are the biggest markets worldwide, based on the number of all-EV cars in use as of 2022:

CountryEstimated Number of EVs in Use
2022
🇨🇳 China11,000,000
🇺🇸 U.S.2,100,000
🇩🇪 Germany1,000,000
🇫🇷 France620,000
🇳🇴 Norway590,000
🇬🇧 UK550,000
🇳🇱 Netherlands340,000
🇰🇷 South Korea300,000
🇨🇦 Canada250,000
🇯🇵 Japan210,000

Source: IEA Global EV Outlook 2023

China is home to over half of the world’s EVs.

Its foothold on the global EV market can be explained by its close proximity to the raw materials used in EV batteries. In fact, China produces roughly 70% of the world’s rare earth metals and has more battery production capacity than all other countries combined.

Adding to this, China developed key government policies that specifically tackled operational hurdles, such as battery constraints, leading to innovation in core technologies. In 2023, EVs made up 31% of all car sales in China, boosted by government incentives and strong consumer demand.

Norway is another leader in the EV market, whose government began introducing EV policies as early as 1990. By 2025, the country aims to phase out internal combustion engine vehicle sales completely. About 80% of all vehicles sales in Norway were EVs in 2022, the highest in the world.

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