عنوان مقاله [English]
Geodesy of gravity is a branch of geodesy that is mostly related to geophysics and geology. Identification of geodesy of gravity from geometric geodesy is based on relevant measurements and theoretical discussions on gravity field properties. These qualities were the same as those which led to discovery of the shape of the Earth, when this information made it possible to understand the dimensions and shape of the Earth by measuring the length of the arc of the Meridian. By collecting enough data from the Earth's gravity field, it is possible to determine the geoid separation from the comparison elliptic (Earth's mathematical form) and to determine the density of the Earth. It is also possible to identify changes in the field of gravity in different parts of the Earth. In the year 1738, Pierre Bouguer attempted to measure the relative perpendicular deviation angle by the Earth's radius mapping operation during explorations in Peru in South America.