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Data Vis Dispatch, July 1: Tanker traffic, N.Y.C. elections, and the race for renewables

The best of last week’s big and small data visualizations
Portrait of Jonathan Dahle
Jonathan Dahle

Welcome back to the 199th edition of Data Vis Dispatch! Every week, we’ll be publishing a collection of the best small and large data visualizations we find, especially from news organizations — to celebrate data journalism, data visualization, simple charts, elaborate maps, and their creators.

Recurring topics this week include the global role of tanker traffic, mayoral elections in New York City, and international comparisons in the race for renewable energy.

A new focus emerged in this week's reporting about the Middle East — tanker traffic around the Strait of Hormuz:

Bloomberg: <a href="https://www.bloomberg.com/news/features/2025-06-29/iran-israel-conflict-worsens-global-shipping-navigation-problems?accessToken=eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzb3VyY2UiOiJTdWJzY3JpYmVyR2lmdGVkQXJ0aWNsZSIsImlhdCI6MTc1MTI3NDkxNSwiZXhwIjoxNzUxODc5NzE1LCJhcnRpY2xlSWQiOiJTWU1ZQ1REV1gyUFMwMCIsImJjb25uZWN0SWQiOiJEMjk1RDc5RkRFQzc0QjQ4OEJDMUY1Mjc1Mjg1RUQ2NSJ9.FxbCNHbv5vGz33BPEjl82OqH5UZBk8Axr9MLnfQizu8"><strong>Electronic Warfare Crashes Global Shipping’s Navigation Systems</strong></a>, June 29
Bloomberg: Electronic Warfare Crashes Global Shipping’s Navigation Systems, June 29
The New York Times: Mideast Conflict Imperils a Tiny Waterway Vital to the World Economy, June 25
Der Spiegel: <a href="https://www.spiegel.de/wissenschaft/iran-israel-konflikt-was-die-strasse-von-hormus-und-andere-nadeloehre-fuer-die-energiemaerkte-bedeuten-a-8c14508d-6ef5-4f88-a8e8-73184cf5246d"><strong>Wo Tanker ins Schussfeld geraten oder stecken bleiben könnten</strong></a> [<em>Where tankers could come under fire or get stuck</em>], June 26
Der Spiegel: Wo Tanker ins Schussfeld geraten oder stecken bleiben könnten [Where tankers could come under fire or get stuck], June 26

Other developments related to the bombing and subsequent ceasefire in Iran, were examined by The Economist:

The Economist: <a href="https://www.economist.com/graphic-detail/2025/06/26/iran-has-come-back-online-for-now"><strong>Iran has come back online—for now</strong></a>, June 26
The Economist: Iran has come back online—for now, June 26
The Economist: <a href="https://www.economist.com/united-states/2025/06/26/the-fallout-from-trumps-iran-strikes-is-political-too"><strong>The fallout from Trump’s Iran strikes is political, too</strong></a>, June 26
The Economist: The fallout from Trump’s Iran strikes is political, too, June 26
The Economist: <a href="https://www.economist.com/graphic-detail/2025/06/24/how-often-do-ceasefires-in-the-middle-east-work"><strong>How often do ceasefires in the Middle East work?</strong></a>, June 24
The Economist: How often do ceasefires in the Middle East work?, June 24

The surprising victory of Zohran Mamdani in New York City's mayoral primary was unsurprisingly well-covered by The New York Times:

The New York Times: <a href="https://www.nytimes.com/interactive/2025/06/25/opinion/mamdani-cuomo-new-york-mayor-election.html?unlocked_article_code=1.R08.CdrQ.oA4grPAUFIUz&amp;smid=nytcore-ios-share&amp;referringSource=articleShare&amp;utm_source=substack&amp;utm_medium=email"><strong>The Anatomy of Mamdani’s Political Earthquake</strong></a>, June 25
The New York Times: The Anatomy of Mamdani’s Political Earthquake, June 25
The New York Times: <a href="https://www.nytimes.com/2025/06/29/nyregion/zohran-mamdani-voters-strategy.html?unlocked_article_code=1.Sk8.R2Au.twHLoKC_oTFa"><strong>How Zohran Mamdani Brought New Voters to the Polls</strong></a>, June 29
The New York Times: How Zohran Mamdani Brought New Voters to the Polls, June 29
The New York Times: <a href="https://www.nytimes.com/interactive/2025/06/24/us/elections/nyc-mayor-primary-results-precinct-map.html"><strong>The Most Detailed Map of the N.Y.C. Mayoral Primary</strong></a>, June 24
The New York Times: The Most Detailed Map of the N.Y.C. Mayoral Primary, June 24

We also found two charts about health issues, a topic we wouldn't mind including more often:

Reuters: <a href="https://www.reuters.com/graphics/USA-HEALTH/AMENORRHEA/dwpklrkaxvm/"><strong>When the cycle stops</strong></a>, June 27
Reuters: When the cycle stops, June 27
McKinsey &amp; Company: <a href="https://www.mckinsey.com/featured-insights/sustainable-inclusive-growth/charts/obesitys-growing-but-unequal-burden"><strong>Obesity’s growing but unequal burden</strong></a>, June 26
McKinsey & Company: Obesity’s growing but unequal burden, June 26

This colorful selection of charts marks the end of this weeks edition, spanning tournaments, democracy, nationalities, interventionism, and sexual orientation:

Micah McCurdy: "FIFA are also pretty reliable in the 'what if [we] made the tournament structure weird in a way that will make it challenging to viz?' […]," June 30 (<a href="https://bsky.app/profile/hockeyviz.com/post/3lstphjrk6s2a"><strong>Bluesky</strong></a>) <span class="badge">Great thread</span>
Micah McCurdy: "FIFA are also pretty reliable in the 'what if [we] made the tournament structure weird in a way that will make it challenging to viz?' […]," June 30 (Bluesky) Great thread
The New York Times: <a href="https://www.nytimes.com/interactive/2025/06/30/climate/china-clean-energy-power.html"><strong>There’s a Race to Power the Future. China Is Pulling Away</strong></a>, June 30
The New York Times: There’s a Race to Power the Future. China Is Pulling Away, June 30
Nexo: <a href="https://www.nexojornal.com.br/grafico/2025/06/27/brasil-populacao-estrangeira-censo-2022-venezuela"><strong>Venezuelanos são o maior grupo de estrangeiros no Brasil</strong></a> [<em>Venezuelans are the largest group of foreigners in Brazil</em>], June 27
Nexo: Venezuelanos são o maior grupo de estrangeiros no Brasil [Venezuelans are the largest group of foreigners in Brazil], June 27
El Orden Mundial: <a href="https://elordenmundial.com/mapas-y-graficos/intervencionismo-estados-unidos-america-latina/"><strong>El intervencionismo de Estados Unidos en América Latina</strong></a><strong> </strong>[<em>US interventionism in Latin America</em>], June 25
El Orden Mundial: El intervencionismo de Estados Unidos en América Latina [US interventionism in Latin America], June 25
WeVis: <a href="https://wevis.info/thaidemocracyin2025/"><strong>9 ทศวรรษ อภิวัฒน์สยาม : ประชาธิปไตยไทยวันนี้ อยู่จุดไหนในโลก?</strong></a> [<em>9 Decades of the Siamese Revolution: Where is Thai Democracy Today in the World?</em>], June 24
WeVis: 9 ทศวรรษ อภิวัฒน์สยาม : ประชาธิปไตยไทยวันนี้ อยู่จุดไหนในโลก? [9 Decades of the Siamese Revolution: Where is Thai Democracy Today in the World?], June 24
Beyond Words Studio: "[…] In the UK, a growing number of people of all ages are identifying as lesbian, gay or bisexual […]," June 27 (<a href="https://www.linkedin.com/posts/beyond-words-studio_with-pride-month-coming-to-a-close-we-wanted-activity-7344316590512848896-51MP?utm_source=share&amp;utm_medium=member_desktop&amp;rcm=ACoAADg6TZkBloZMKNiBJ3SZtJ0Jvy2mEqnIVmA"><strong>LinkedIn</strong></a>)
Beyond Words Studio: "[…] In the UK, a growing number of people of all ages are identifying as lesbian, gay or bisexual […]," June 27 (LinkedIn)

What else we found interesting

Chartography: <a href="https://www.chartography.net/p/stripped-of-verbal-shamvivid-unescapable"><strong>"Stripped of Verbal Sham—Vivid, Unescapable,"</strong></a><strong> </strong>June 24
Chartography: "Stripped of Verbal Sham—Vivid, Unescapable," June 24
Financial Times: <a href="https://ig.ft.com/russia-eastern-border/"><strong>Is Europe prepared for war?</strong></a>, July 1 <span class="badge">Extensive report</span>
Financial Times: Is Europe prepared for war?, July 1 Extensive report
Financial Times: <a href="https://www.ft.com/content/3f62b404-9550-42ca-b3ef-cb7c4626b8f4"><strong>How we made it: Dual heat domes hit Europe and US</strong></a>, June 30
Financial Times: How we made it: Dual heat domes hit Europe and US, June 30

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Portrait of Jonathan Dahle

Jonathan Dahle (he/him) is a working student on Datawrapper’s communications team. When he’s not supporting his colleagues, you can find him exploring Berlin, enjoying the outdoors, or creating audiovisual and 3D art. Besides working at Datawrapper, Jonathan is a design student and freelance photographer.

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