#TodayinHistory #dataviz #OTD 📊 💀Oct 30, 1626 Willebrord van Roijen Snell died in Leiden, Netherlands 🇳🇱 1617: First use of Gemma Frisius' method of trigonometric triangulation to produce locations of major cities in Holland, Laid the foundation for modern surveying and the field of geodesy.

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This week's #TidyTuesday uses data from my IKEA place names project https://karaman.is/ikea-place-names. I made a small IKEA version of The Economist's Big Mac index. Code: https://github.com/gkaramanis/tidytuesday/tree/master/2026/2026-week_44 #RStats #dataviz

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Reminder that the Dataviz Project exists and that it is very cool. 📊

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Or a PDF-zine version for a smaller prize. That could still earn some money and would also be lasting... I am not involved in the DVS, I just support it.

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Information Design Conference in Hilversum, the Netherlands is coming this Friday! Here are some of my favourite historical Dutch dataviz and cartograms. attilabatorfy.substack.com/p/idc26-spec...

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