Geocentric translations (geocentric domain)


Data source: EPSG

Information source: EPSG guidance note #7-2, http://www.epsg.org

Revision date: 2009-11-17

Remarks: This method allows calculation of geocentric coords in the target system by adding the parameter values to the corresponding coordinates of the point in the source system. See methods 1035 and 9603 for similar tfms operating between other CRSs types.


Note: These formulas have been transcribed from EPSG Guidance Note #7-2. Users are encouraged to use that document rather than the text which follows as reference because limitations in the transcription will be avoided.

Xt = Xs + dX;  Yt = Ys + dY;  Zt = Zs + dZ


Given a three parameter datum shift from WGS 84 to ED50 for this North Sea area is given as 
dX = +84.87m, dY = +96.49m, dZ = +116.95m. 

The given WGS 84 geocentric values are:

   XA = 3771 793.97m
   YA =   140 253.34m
   ZA = 5124 304.35m

Applying the three geocentric translations to these source CRS coordinates we obtain new geocentric values now related to the target CRS ED50:

   XB = 3771 878.84m
   YB =   140 349.83m
   ZB = 5124 421.30m
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