The library of Eratosthenes

Barranha

Friday 14 December 2007 by perbosc

Matosinhos Barranha Portugal

4460-432 Matosinhos Barranha

Avenida Vasco da Gama

Portugal

14 december 2007

date city lat. (°’) lat.(dec) gnomon shadow angle (°’) angle (dec)
14 dec Lafranç. +44°08’ +44,13° 100 cm 239 cm +67°17’ +67,28°
14 dec Barranha +41°19′ +41,32° 27,3 cm 55,7 cm +63°54’ +63,90°

Lafrançaise-Barranha

Angle difference 67,28-63,90 = 3,38°
Distance 313 km
Circumference of the Earth 313x360/3,38 = 33337km


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