Maarten Lambrechts's Avatar

Maarten Lambrechts

@maartenzam.bsky.social

Data visualization consultant at the Development Data Group of the World Bank www.maartenlambrechts.com

3,662 Followers  |  554 Following  |  241 Posts  |  Joined: 06.02.2024  |  2.2829

Latest posts by maartenzam.bsky.social on Bluesky

https://www.pnas.org/doi/10.1073/pnas.2322597121

https://www.pnas.org/doi/10.1073/pnas.2322597121

At 185 mph maximum sustained winds, Cat 5 Hurricane #Melissa is now just 7 mph shy of what @michaelfwehner.bsky.social r.bsky.social & Jim Kossin have defined as the cutoff for a prospective "Cat 6" hurricane:
www.pnas.org/doi/10.1073/...

28.10.2025 17:02 โ€” ๐Ÿ‘ 318    ๐Ÿ” 160    ๐Ÿ’ฌ 9    ๐Ÿ“Œ 19
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12 hours of Hurricane #Melissa, one frame every minute. ๐Ÿ›ฐ๏ธ๐Ÿ—บ๏ธ

28.10.2025 01:22 โ€” ๐Ÿ‘ 68    ๐Ÿ” 26    ๐Ÿ’ฌ 3    ๐Ÿ“Œ 1
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The before and after of the East Wing demolition is wild... ๐Ÿ˜จ

See for yourself: shorturl.at/TrWu3

#WhiteHouse #WhiteHouseWall #EastWing #Trump

24.10.2025 06:18 โ€” ๐Ÿ‘ 8    ๐Ÿ” 4    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
Xenographics โ€“ Weird but (sometimes) useful charts

Absolutely delighted to catch up with Xenographics, an initiative of @maartenzam.bsky.social. It was a big thing on Twitter some 4-5 years ago and I wish that the conversation would carry over on Bluesky. ๐Ÿ“Š

xeno.graphics

23.10.2025 01:28 โ€” ๐Ÿ‘ 27    ๐Ÿ” 6    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 0
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Waimakariri River, New Zealand

22.10.2025 19:32 โ€” ๐Ÿ‘ 87    ๐Ÿ” 14    ๐Ÿ’ฌ 3    ๐Ÿ“Œ 1

Hi. It's me. 2 weeks later. This is done. 58 frames over 3 seconds, *50* layers in the final image. WOO. This was a long edit, felt like ACTUAL work so unless I get it again with the actual sunset I doubt I'll be editing more like this. Psyched for the final piece tho! ๐Ÿชถ

28.09.2025 04:49 โ€” ๐Ÿ‘ 2499    ๐Ÿ” 565    ๐Ÿ’ฌ 53    ๐Ÿ“Œ 18

Very sad data journalist job posting

17.10.2025 14:47 โ€” ๐Ÿ‘ 6    ๐Ÿ” 3    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Part of Wadden Sea in false color

More: whc.unesco.org/en/list/1314/

๐Ÿ“ธ๐Ÿ›ฐ #Sentinel2

Footage: @sentinelonline.bsky.social

16.10.2025 22:35 โ€” ๐Ÿ‘ 5    ๐Ÿ” 2    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

Salesforce owns Tableau. Time to drop all mentions from classes and trainings #dataViz

17.10.2025 03:02 โ€” ๐Ÿ‘ 76    ๐Ÿ” 23    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 2

Excellent graphics in this one

17.10.2025 07:58 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

I was also curious.It's here: www.google.com/maps/@51.799...

16.10.2025 15:04 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

"The data's in PDF."

12.10.2025 16:08 โ€” ๐Ÿ‘ 77    ๐Ÿ” 12    ๐Ÿ’ฌ 3    ๐Ÿ“Œ 1
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Since I keep rediscovering it:

David Rumsey's Historical Map Collection is an absolutely fantastic resource, also for historical #datavis

www.davidrumsey.com

12.10.2025 09:20 โ€” ๐Ÿ‘ 41    ๐Ÿ” 11    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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Well, it's official. After our paper last year (onlinelibrary.wiley.com/doi/full/10....), the Slender-billed Curlew is officially declared Extinct today.

Scientists dream of describing new species, not writing their obituary and epitaph, knowing that they are gone forever #ornithology

10.10.2025 08:54 โ€” ๐Ÿ‘ 519    ๐Ÿ” 313    ๐Ÿ’ฌ 31    ๐Ÿ“Œ 45

Immigrant Nobel Prize winners exiting the United States

10.10.2025 11:24 โ€” ๐Ÿ‘ 3031    ๐Ÿ” 863    ๐Ÿ’ฌ 48    ๐Ÿ“Œ 26
Iceberger

That is not how icebergs float :) joshdata.me/iceberger.html

09.10.2025 06:52 โ€” ๐Ÿ‘ 2    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

These must be some of the most morally bankrupt graphics ever made

08.10.2025 18:13 โ€” ๐Ÿ‘ 4    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
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Updated a classic.

08.10.2025 10:58 โ€” ๐Ÿ‘ 80    ๐Ÿ” 19    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 2
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The war in Gaza has been going on for two years. It must end.

07.10.2025 15:20 โ€” ๐Ÿ‘ 26    ๐Ÿ” 8    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0

2015-2024

๐Ÿ˜Š๐Ÿ“น

bsky.app/profile/kosm...

02.10.2025 11:21 โ€” ๐Ÿ‘ 97    ๐Ÿ” 33    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 3
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Our researchers have noticed today that NASA FIRMS, one of the main free and available open source sites for monitoring fires around the world has a new notice on it stating that NASA is no longer updating the site due to a lack in federal funding. firms.modaps.eosdis.nasa.gov/map/

02.10.2025 17:09 โ€” ๐Ÿ‘ 283    ๐Ÿ” 156    ๐Ÿ’ฌ 5    ๐Ÿ“Œ 12
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The amazingly astonishing Assiniboine River, Manitoba, Canada, again.

30.09.2025 01:06 โ€” ๐Ÿ‘ 69    ๐Ÿ” 12    ๐Ÿ’ฌ 3    ๐Ÿ“Œ 0
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So here it is: my dumb data viz experiment. ๐Ÿฉ

โœ”๏ธ Solves the continuity problem
โŒ Harder to spot patterns
โŒ Hours are visually distorted

But heyโ€ฆ not everything has to be practical, sometimes itโ€™s just fun! ๐Ÿ˜… Also: how cool would it be to create a physical object like this?

29.09.2025 23:28 โ€” ๐Ÿ‘ 29    ๐Ÿ” 4    ๐Ÿ’ฌ 5    ๐Ÿ“Œ 0

Sentinel Hub works like that, which was acquired by Planet, where Rob and I were colleagues. It seems like a nice paradigm, bit interfaces are clunky and very limiting

26.09.2025 17:49 โ€” ๐Ÿ‘ 1    ๐Ÿ” 0    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0

Ik know where *that*'s coming from ;)

26.09.2025 17:01 โ€” ๐Ÿ‘ 0    ๐Ÿ” 0    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
An array of 9 purple discs on a blue background. Figure from Hinnerk Schulz-Hildebrandt.

An array of 9 purple discs on a blue background. Figure from Hinnerk Schulz-Hildebrandt.

A nice shift in perceived colour between central and peripheral vision. The fixated disc looks purple while the others look blue.

The effect presumably comes from the absence of S-cones in the fovea.

From Hinnerk Schulz-Hildebrandt:
arxiv.org/pdf/2509.115...

24.09.2025 10:16 โ€” ๐Ÿ‘ 696    ๐Ÿ” 261    ๐Ÿ’ฌ 30    ๐Ÿ“Œ 42
A photograph of the Earth taken from Himawari-8, showing the earth perfectly divided into day on the left and night on the right, with the day/night divider running from the north pole to the south pole.

A photograph of the Earth taken from Himawari-8, showing the earth perfectly divided into day on the left and night on the right, with the day/night divider running from the north pole to the south pole.

A photograph of the Earth taken from Himawari-8, showing the earth perfectly divided into day on the left and night on the right, with the day/night divider running from the north pole to the south pole. A thin circle and dotted line are overlaid to show the division of the full circle into two semicircles.

A photograph of the Earth taken from Himawari-8, showing the earth perfectly divided into day on the left and night on the right, with the day/night divider running from the north pole to the south pole. A thin circle and dotted line are overlaid to show the division of the full circle into two semicircles.

Happy September Equinox! Today the dividing line between day and night runs exactly from the North pole to the South pole, and the sun is directly over the equator. This is an actual image of the Earth today, taken from the Himawari-8 satellite.

22.09.2025 11:34 โ€” ๐Ÿ‘ 355    ๐Ÿ” 91    ๐Ÿ’ฌ 4    ๐Ÿ“Œ 3
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Fresh Planet Labs imagery (15Sep v 1Sep) shows already displaced Gazans leaving for the south. Most tents gone - as expected - first from north (Naser) and south (Tel El Hawa) n'hoods.

17.09.2025 08:31 โ€” ๐Ÿ‘ 9    ๐Ÿ” 6    ๐Ÿ’ฌ 1    ๐Ÿ“Œ 0
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A World of Tides The most recent issue of ArcUser, a magazine for Esri GIS software users spotlights cartographer Dave Taylorโ€™s striking Oceanic Oscillations map.

A lovely ocean tides map using the Spilhaus projection for some Wednesday mappy goodness #MapoftheWeek mapoftheweek.substack.com/p/a-world-of...

17.09.2025 10:46 โ€” ๐Ÿ‘ 62    ๐Ÿ” 17    ๐Ÿ’ฌ 0    ๐Ÿ“Œ 0
Graph based on the data in https://en.wikipedia.org/wiki/Men%27s_pole_vault_world_record_progression , showing the world record height evolution from 1965 (about 5.3m) to 2025 (6.30m). The world records by Sergey Bubka are indicated in blue. In the first part of his career, there was a rapid succession of world records and then it leveled off (second derivative of the curve is negative). After about 20 years without world records (flat line in the curve, first derivative ~0), Armand Duplantis started breaking world records, cm by cm (indicated in orange). The second derivative is positive, which means the curve bends upwards.

Graph based on the data in https://en.wikipedia.org/wiki/Men%27s_pole_vault_world_record_progression , showing the world record height evolution from 1965 (about 5.3m) to 2025 (6.30m). The world records by Sergey Bubka are indicated in blue. In the first part of his career, there was a rapid succession of world records and then it leveled off (second derivative of the curve is negative). After about 20 years without world records (flat line in the curve, first derivative ~0), Armand Duplantis started breaking world records, cm by cm (indicated in orange). The second derivative is positive, which means the curve bends upwards.

I naively thought: let's roughly extrapolate the height at which Mondo Duplantis's pole vault world record series would end. The second derivative turns out to be positive! ๐Ÿ˜ฑ
#math in the wild #tokyo2025 #worldathletics

16.09.2025 07:07 โ€” ๐Ÿ‘ 28    ๐Ÿ” 4    ๐Ÿ’ฌ 2    ๐Ÿ“Œ 1

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