Method to measure Earth missed by ancient Greeks?

TL;DR

The paper presents a simple, accessible method for measuring Earth's dimensions using basic observations and modern tools, which could have been employed by ancient Greek scientists.

Contribution

It introduces a straightforward technique for Earth measurement that relies solely on local observations, applicable both with modern technology and ancient methods.

Findings

Method can accurately estimate Earth's size using minimal tools.

Accessible to ancient Greek science with naked eye observations.

Modern technology simplifies the measurement process.

Abstract

I describe a simple method to calculate Earth dimensions using only local measurements and observations. I used modern technology (a digital photo camera and Google Earth) but the exact same method can be used without any aid, with naked eye observations and distances measured by walking, and so it was perfectly accessible to Ancient Greek science.