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Geodetic Reference Systems GR Greece Geodetic Reference System
graphic22. Sept. 1998/
graphic25.01.12
Geodetic Reference Systems Greece
GGRS87 / EGSA87 Greece Geodetic Reference System
Name (Init.): Greek Geodetic Reference System 1987, ΕΓΣΑ87 (EGSA87)
Ellipsoid: GRS80
Central Point: Observatory Athens
related information
old Greek Datum ? Greece Geodetic Reference System
Name (Init.):
Ellipsoid: Bessel 1841
Central Point: Observatory Athens
CRS relationships GR Greece Geodetic Reference System
graphic22. Sept. 1998/
graphic25.01.12
CRS Relationships Greece
Area
Datum
Central Point
Spheroid
Parameters
 
 
 
 
 
 
 
 
 
 
 
 
Description
Source
 
 
 
 
 
 
 
 
dx [m]
dy [m]
dz [m]
rx ["]
ry ["]
rz ["]
ds [ppm]
 
 
 
 
Greece
GGRS87 / EGSA87 / ΕΓΣΑ87
Observatory Athens
GRS80 
- 199.72 m
+74.03 m
+246.08 m
-
-
-
-
EGRS87 / GGRS87 > WGS84
 
 
 
 
Observatory Athens
Bessel 1841
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Belgium, Denmark, Germany, France, Greece, Italy, Luxemburg, Netherlands, NATO, Norway, Spain, Sweden, Turkey
ED50
 
 
Hayford  1924