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There are a number of similar projects in other regions of the world such as
Europe and South America.
EUREF In Europe, a project known as
EUREF, has become well established since it was started in the 1950’s. Today
it includes nearly 100 permanent tracking stations covering virtually the
whole of Europe. There are also a number of receivers outside Europe in North
Africa and the Middle East which contribute to the project’s data sets. The
objectives of EUREF are: The realization of a geocentric reference frame for
geodetic geodynamical applications and; The determination of transformation
parameters for the national networks. EUREF also includes a section to
investigate and implement a uniform vertical reference system for Europe which
is known as the EVRS
SIRGAS The SIRGAS Project (Sistema de
Referência Geocêntrico para a América do Sul) was initiated in October 1993
and includes most South American countries. This has proven to be a very
successful project which now includes a component to define a vertical datum
[9]. The initial objectives of the project were: To define a reference system
for South America; To establish and maintain reference network; and To define
and establish a geocentric datum.
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