Precession of the equinoxes. Sacred Geometry. The Sacred mean - (5:8 or 1:1.618 or Φ) (The Divine Proportion, Golden Section, Golden ratio, Phi, ) One of the Key-stones of sacred geometry is the 'sacred mean' or 'golden section'.
Vitruvian Man: Leonardo Da Vinci. One of the fundamental products of this underlying mathematical structure is the 'sacred mean', a mathematical constant which is visible across the spectrum of the natural world. Geodesy Homepage. Prehistoric Geodesy: (Greek geōdaisiā : geō - 'earth', daiesthai - 'to divide') According to the classical definition by Freidrich Robert Helmert (1880), 'Geodesy is the science of the measurement and mapping of the Earth's surface'. (4) Geodesy, along with astronomy and geography are among the oldest sciences dealing with the planet earth.
The Science of Geodesia is commonly attributed to the Greeks, namely Pythagoras (580-500 BC) and his school who were the first Greeks to propose a spherical earth, which by the time of Aristotle (384-322 BC), was a generally accepted concept and had been substantiated by observation. However, the official founder of geodesy is Eratosthenes of Alexandria (276-195 BC), who was the first person to approximately deduced the earth's radius. Eratosthenes realised that at noon on summer solstice the rays of the sun descended vertically into a well in Syene (modern day Aswan).
The Evidence: Geodesy Homepage.