Data Visualization and Cholera: An Unexpected Connection
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Data Visualization and Cholera: An Unexpected Connection

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Radial chart london cholera

Data Visualization and Cholera: An Unexpected Connection

Necessity is the mother of invention, and in the mid-1800s, understanding the spread of cholera was a matter of life and death.

Ruthless Efficiency

Cholera was a ruthlessly efficient killer, with both rapid onset and severe symptoms. By the time the disease made its way to London and New York in the early 1830s, hundreds of thousands of people had died across Europe, Africa, and Asia.

Not only our personal and national interests, […] it may be said without exaggeration, [that cholera] concerns the whole human race.

– Thomas Whiteside Hime

Needless to say, the human race was concerned. Thanks to high-speed printing press technology, daily newspaper circulations were rising dramatically, and this allowed journalists to experiment with new reporting techniques, including charting data.

cholera line chart

At the time, the chart above was such a novel approach that it required four paragraphs to explain how to read it. People of that era were simply not used to seeing data in a visual form. At a glance though, the chart is extremely effective at communicating a grim message: cholera had ravaged New York City over the summer of 1849.

Despite the concerted push to eradicate the disease, the medical community was still largely in the dark about how to prevent future outbreaks. Because doctors could treat numerous patients without falling ill, it was assumed that a miasmic environment (i.e. slums, densely-packed housing) was causing the spread.

Data Viz in the Time of Cholera

Today, we have tools that allow us to map just about anything, but in the mid-1800s, mapping data was still an innovative concept.

As early as the 1830s, geographers began using spatial analysis to study cholera epidemiology. The heat map below shows which sections of Paris were hardest hit by a recent outbreak of cholera.

1832 cholera map paris

In 1854, Dr. John Snow was convinced that cholera was spreading via tainted water and decided to display neighborhood mortality data directly on a map. This method clearly revealed a cluster of cases around a specific pump.

john snow cholera map
View the full version of the map here

The result is one of the most influential maps in modern history.

In addition to the real-world utility the map provided in helping physicians understand how cholera was spreading, it also exemplified a seismic shift in thinking that opened up new avenues for data to be analyzed and displayed.

Despite the tragic circumstances of the time period, we can be thankful that the urgency of the situation allowed the world’s pioneering researchers, journalists, and physicians to experiment with new data visualization techniques to better understand the world.

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Markets

Mapping The Biggest Companies By Market Cap in 60 Countries

Tech, finance or energy giant? We mapped the biggest companies by market cap and industry.

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Mapping The Biggest Companies By Market Cap in 60 Countries Share

The Biggest Companies By Market Cap in 60 Countries

Tech giants are increasingly making up more of the Fortune 500, but the world’s biggest companies by market cap aren’t so cut and dry.

Despite accounting for the largest market caps worldwide—with trillion-dollar companies like Apple and contenders including Tencent and Samsung—tech wealth is largely concentrated in just a handful of countries.

So what are the biggest companies in each country? We mapped the largest company by market cap across 60 countries in August 2021 using market data from CompaniesMarketCap, TradingView, and MarketScreener.

What are the Largest Companies in the World?

The world has 60+ stock exchanges, and each one has a top company. We looked at the largest local company, since many of the world’s largest firms trade on multiple exchanges, and converted market cap to USD.

CountryCompanyIndustryMarket Cap (August 2021)
USAAppleTechnology$2.5T
Saudi ArabiaSaudi AramcoEnergy$1.9T
TaiwanTSMCTechnology$594.5B
ChinaTencentTechnology$554.0B
South KoreaSamsungTechnology$429.7B
FranceLVMHConsumer Cyclical$414.3B
SwitzerlandRocheHealthcare$350.0B
NetherlandsASMLTechnology$322.6B
JapanToyotaConsumer Cyclical$251.6B
DenmarkNovo NordiskHealthcare$236.7B
IrelandAccentureTechnology$208.2B
IndiaReliance IndustriesEnergy$198.1B
AustraliaBHP GroupMaterials$191.7B
CanadaShopifyTechnology$185.7B
UKAstrazenecaHealthcare$182.0B
GermanySAPTechnology$174.6B
SingaporeSEATechnology$152.3B
Hong KongAIAFinancials$146.4B
BelgiumAnheuser-Busch InbevConsumer Staples$122.7B
SpainInditexConsumer Cyclical$108.3B
BrazilVALEMaterials$103.9B
RussiaSberbankFinancials$96.7B
ItalyEnelUtilities$93.7B
ArgentinaMercadoLibreConsumer Cyclical$89.5B
SwedenAtlas CopcoIndustrials$84.1B
South AfricaNaspersTechnology$74.1B
NorwayEquinorEnergy$67.9B
UAEEtisalatCommunication$58.7B
MexicoWalmexConsumer Staples$58.1B
IndonesiaBank Cental AsiaFinancials$54.8B
KazakhstanKaspi.kzFinancials$49.8B
QatarQNBFinancials$48.2B
FinlandNordea BankFinancials$48.0B
LuxembourgArcelorMittalMaterials$36.3B
AustriaVerbundUtilities$33.7B
ThailandPTT PCLEnergy$30.1B
ColombiaEcopetrolEnergy$26.7B
MalaysiaMaybankFinancials$23.7B
PhilippinesSM InvestmentsConsumer Cyclical$22.9B
KuwaitKuwait Finance HouseFinancials$21.9B
PortugalEDP GroupUtilities$21.0B
VietnamVinhomesReal Estate$17.1B
IsraelNICETechnology$16.9B
KenyaSafaricomCommunication$16.0B
Czech RepublicÄŒEZ GroupEnergy$15.8B
New ZealandXeroTechnology$15.8B
TurkeyQNB FinansbankFinancials$15.8B
HungaryOTP BankFinancials$15.6B
ChileEnel AmericasUtilities$14.3B
MoroccoMaroc TelecomCommunication$13.6B
PolandPKO Bank PolskiFinancials$12.6B
CyprusPolymetalMaterials$10.0B
NigeriaDangote GroupMaterials$10.0B
BahrainAhli United BankFinancials$8.6B
GreeceOTE GroupCommunication$8.4B
PeruCredicorpFinancials$8.0B
EgyptCommercial International BankFinancials$5.9B
IcelandMarelIndustrials$5.8B
OmanBank MuscatFinancials$4.2B
PanamaCopa HoldingsIndustrials$3.1B

Many are former monopolies or massive conglomerates that have grown in the public space, such as South Africa’s Naspers and India’s Reliance Industries.

Others are local subsidiaries of foreign corporations, including Mexico’s Walmex, Chile’s Enel and Turkey’s QNB Finansbank.

But even more noticeable is the economic discrepancy. Apple and Saudi Aramco are worth trillions of dollars, while the smallest companies we tracked—including Panama’s Copa Group and Oman’s Bank Muscat—are worth less than $5 billion.

Finance and Tech Dominate The Biggest Companies By Market Cap

Across the board, the largest companies were able to accumulate wealth and value.

Some are newer to the top thanks to recent success. Canada’s Shopify has become one of the world’s largest e-commerce providers, and the UK’s AstraZeneca developed one of the world’s COVID-19 vaccines.

But the reality is most companies here are old guards that grew on existing resources, or in the case of banks, accumulated wealth.

IndustryBiggest Companies by Country
Financials16
Technology12
Energy6
Materials5
Communication4
Consumer Cyclical4
Utilities4
Healthcare3
Industrials3
Consumer Staples2
Real Estate1

Banks were the most commonly found at the top of each country’s stock market. Closely behind were oil and gas giants, mining companies, and former state-owned corporations that drove most of a country’s wealth generation.

But as more economies develop and catch up to Western economies (where tech is dominant), newer innovative companies will likely put up a fight for each country’s top company crown.

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Misc

All World Languages in One Visualization

See the world’s major languages broken down by country in this stunning visualization.

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All World Languages, By Native Speakers

View a high resolution version of today’s graphic by clicking here.

Languages provide a window into culture and history. They’re also a unique way to map the world – not through landmasses or geopolitical borders, but through mother tongues.

The Tower of Babel

Today’s infographic from Alberto Lucas Lopez condenses the 7,102 known living languages today into a stunning visualization, with individual colors representing each world region.

Only 23 languages are spoken by at least 50 million native speakers. What’s more, over half the planet speaks at least one of these 23 languages.

Chinese dominates as a macrolanguage, but it’s important to note that it consists of numerous languages. Mandarin, Yue (including Cantonese), Min, Wu, and Hakka cover over 200 individual dialects, which vary further by geographic location.

CountryNative Chinese speakers (millions)
🇨🇳 China1,152.0
🇹🇼 Taiwan21.8
🇭🇰 Hong Kong SAR6.5
🇲🇾 Malaysia5.1
🇸🇬 Singapore1.8
🇹🇭 Thailand1.2
🇻🇳 Vietnam0.9
🇵🇭 Philippines0.7
🇲🇲 Myanmar0.5
🇲🇴 Macau SAR0.5
Other6.0
Total1,197 million

Chinese is one of the most challenging languages for English speakers to pick up, in part due its completely unfamiliar scripts. You’d have to know at least 3,000 characters to be able to read a newspaper, a far cry from memorizing the A-Z alphabet.

Spanglish Takes Over

After Chinese, the languages of Spanish and English sit in second and third place in terms of global popularity. The rapid proliferation of these languages can be traced back to the history of Spanish conquistadors in the Americas, and British colonies around the world.

Animation: Map of Colonization (1492 – 2008):
Colonization Map

Today, Spanish has 399 million native speakers, but these are mostly concentrated in Latin America. English has 335 million native speakers under its belt, with a widespread reach all over the globe.

Two Worlds, One Family

While the visualization makes all the world languages seem disparate, this linguistic family tree shows how they grew from a common root. It also explains how languages can evolve and branch out over time.

Language Tree

Created by Minna Sundberg. Full version.

This linguistic tree also includes many languages that are not on the large visualization of 23 mother tongues. Some of them might be considered endangered or at risk today, such as Catalan or Welsh. However, with globalization, a few interesting linguistic trends are arising.

1. Language revival
Certain enclaves of marginalized languages are being preserved out of pride for the traditional and cultural histories attached.

While Catalan was once banned, its rebirth is a key marker of identity in Barcelona. More than 150 universities teach Catalan worldwide. In the case of Welsh, a mammoth university project plans to make sure it does not die out. Researchers are compiling ten million Welsh words to preserve the past, present, and future of the language.

2. Language forecast
At this point in time, English is the lingua franca – adopted as a common language among speakers with different mother tongues. However, this status might soon be fuzzier as demographic trends continue.

The rise of China is an obvious one to consider. As China continues to increase its economic might and influence, its languages will proliferate as well.

At the same time, 26 African countries are projected to double their current size, many of which speak French as a first language. One study by investment bank Natixis suggests that Africa’s growth may well bring French to the forefront – making it the most-spoken language by 2050.

Could French provide a certain je ne sais quoi that no other world language can quite replace?

This post was first published in 2018. We have since updated it, adding in new content for 2021.

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