Our website is made possible by displaying online advertisements to our visitors.
Please consider supporting us by disabling your ad blocker.

Responsive image

Figure of the Earth

For the historical development of the concept, see Spherical Earth and Flat Earth.
For effects of and evidence for, see Empirical evidence for the spherical shape of Earth.

Geodesy
Fundamentals
Concepts
Technologies
Standards (history)
NGVD 29 Sea Level Datum 1929
OSGB36 Ordnance Survey Great Britain 1936
SK-42 Systema Koordinat 1942 goda
ED50 European Datum 1950
SAD69 South American Datum 1969
GRS 80 Geodetic Reference System 1980
ISO 6709 Geographic point coord. 1983
NAD 83 North American Datum 1983
WGS 84 World Geodetic System 1984
NAVD 88 N. American Vertical Datum 1988
ETRS89 European Terrestrial Ref. Sys. 1989
GCJ-02 Chinese obfuscated datum 2002
Geo URI Internet link to a point 2010

In geodesy, the figure of the Earth is the size and shape used to model planet Earth. The kind of figure depends on application, including the precision needed for the model. A spherical Earth is a well-known historical approximation that is satisfactory for geography, astronomy and many other purposes. Several models with greater accuracy (including ellipsoid) have been developed so that coordinate systems can serve the precise needs of navigation, surveying, cadastre, land use, and various other concerns.


Previous Page Next Page






صورة الأرض Arabic Фігура Зямлі BE Форма на Земята Bulgarian পৃথিবীর আকার Bengali/Bangla Figura de la Terra Catalan Erdfigur German Forma de la Tierra Spanish Maa kuju ET شکل سیاره زمین FA Figure de la Terre French

Responsive image

Responsive image