To install click the Add extension button. That's it.

The source code for the WIKI 2 extension is being checked by specialists of the Mozilla Foundation, Google, and Apple. You could also do it yourself at any point in time.

4,5
Kelly Slayton
Congratulations on this excellent venture… what a great idea!
Alexander Grigorievskiy
I use WIKI 2 every day and almost forgot how the original Wikipedia looks like.
Live Statistics
English Articles
Improved in 24 Hours
Added in 24 Hours
Languages
Recent
Show all languages
What we do. Every page goes through several hundred of perfecting techniques; in live mode. Quite the same Wikipedia. Just better.
.
Leo
Newton
Brights
Milds

South American Datum

From Wikipedia, the free encyclopedia

The South American Datum (SAD) is a regional geodesic datum for South America. It was established in Brazil by SIRGAS 2000, and was made official in 2005.

SAD69

SAD was established as the regional geodetic datum for South America in 1969. This datum includes the Brazilian Geodetic System (Sistema Geodésico Brasileiro, or SGB), and uses the geoid as defined by the ellipsoid of the Geodetic Reference System - SGR-67 - accepted and recommended by the International Union of Geodesy and Geophysics at Lucerne in 1967. This ellipsoid is defined from the parameters:

  • Topocentric orientation:
    • an axis of rotation parallel to the Earth's axis of rotation; plan meridian parallel to the Greenwich Meridian;
  • Topocentric orientation: considered planimetric datum, the Vertex Chuá chain triangulation of parallel 20° South, in Minas Gerais:
    • geodetic latitude = 19° 45' 41.6527" S
    • astronomical latitude = 19° 45' 41.34" S
    • geodetic longitude = 48° 06' 04.0639" W
    • astronomical longitude = 48° 06' 07.80" W
    • Geodetic Azimuth = 271° 30' 04.05" SWNE; Astronomical Azimuth = 271° 30' 05.42" SWNE for VT-Uberaba
    • geodetic undulation N = 0.0 meters
  • SGB Altimetry datum coincides with the equipotential surface that contains the mean sea level, defined by the tide gauge observations taken in Imbituba, on the coast at Santa Catarina.
This page was last edited on 16 October 2018, at 15:30
Basis of this page is in Wikipedia. Text is available under the CC BY-SA 3.0 Unported License. Non-text media are available under their specified licenses. Wikipedia® is a registered trademark of the Wikimedia Foundation, Inc. WIKI 2 is an independent company and has no affiliation with Wikimedia Foundation.