Retell the text in brief оr make your own project on the text. Text: Geodesy: definition, classification, problems(I)

Text: Geodesy: definition, classification, problems(I)

1.Read and memorize new words and expressions on the text:

measurement and mapping of the surface

external gravity field

engineering sciences

global geodesy

geodetic surveying

plane surveying

to determine

solid terrestrial body

marine geodesy

observed parameters

includes the determination

engineering sciences

may be divided into the areas

studies the figure of the earth

complete external gravity field

define the surface

heavenly bodies.

formulation of the problem

2.Read and translate the text

According to the classical definition geodesy is the science of the measurement and mapping of the earth's surface, it includes the determination of the earth s external gravity, field as well as the surface of the ocean floor. Geodesy mav be included in the geosciences, and also in the engineering sciences. It turned in collaboration with other sciences such as selenodesy and planetary geodesy.

Geodesy, may be divided into the areas of global geodesy, geodetic surveying, and plane surveying.Global geodesy studies the figure of the earth including the complete external gravity field. A geodetic survey defines the surface of a country by the coordinates of a sufficiently large number of control points. In plane surveying (topographic surveing, cadastral surveing, engineering surveying), the details of the land surface are obtained.

The problem, of geodesy is to determine the figure and the external gravity field of the earth and of the other heavenly bodies. This geodetic problem incorporates a geometric (figure of the earth) and a physical (gravity field) formulation of the problem: both are closely related.