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Between 1816 and 1855, the Struve Geodetic Arc linked survey stations across 2,820 kilometres to measure a long meridian segment and refine Earth's dimensions.

Measuring Earth one triangle at a time

ScienceHistoryEngineering

Why it matters

The idea in context

Friedrich Georg Wilhelm Struve's triangulation chain ran from the Black Sea towards the Arctic Ocean, across territory now divided among ten countries. Observers climbed hills and towers to sight distant points, extending one carefully measured baseline through hundreds of triangles. The planet's curve emerged from patience, geometry and a continental relay of clear views.

Türkçe

Aynı kart, başka bir dilde.

1816 ile 1855 arasında Struve Jeodezik Yayı, 2.820 kilometre boyunca ölçüm noktalarını bağlayarak uzun bir meridyen parçasını ölçtü ve Dünya'nın boyutlarına ilişkin hesabı geliştirdi.
Dünya'yı üçgen üçgen ölçmek

Friedrich Georg Wilhelm Struve'nin nirengi zinciri, Karadeniz'den Kuzey Buz Denizi yönüne uzanıyor; bugün on ülkeye bölünmüş topraklardan geçiyordu. Gözlemciler uzak noktaları görebilmek için tepelere ve kulelere çıktı, dikkatle ölçülmüş tek bir tabanı yüzlerce üçgen boyunca büyüttü. Gezegenin eğrisi; sabır, geometri ve kıta ölçeğinde birbirine aktarılan açık görüşlerden belirdi.

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Background reading: Struve Geodetic ArcAttribution and context are revised when stronger evidence appears. Corrections are welcome through the editorial page.
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