[GIS] Transformation Parameters from ETRS89 (2004) to WGS84

coordinate systemwgs84

I have XYZ coordinates of a point measured in year 2004 in ETRS89 coordinate system and I need to transform it to geodetic coordinates in WGS84.
Since ETRS89 changes yearly, so do the transformation parameters.
-As far as I understood there is about 2.5 cm change per year.

I am wondering where could those transformation parameters for the year 2004 be found in order to perform the needed transformation.

Best Answer

The official site http://etrs89.ensg.ign.fr/ mentions that after ETRF2000 it was decided to continue using that frame for 2005 and 2008. So your data should be in the ETRF2000 frame.

You may find more hints at How can I convert/transform coordinates from ETRS89 to WGS84 UTM 36N in QGIS and http://www.novatel.com/support/known-solutions/wgs84-to-etrs89-datum-transformations/

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[GIS] Accurate Transformation of Gauss Kruger to WGS84 and ETRS89 using PROJ.4

With GDAL 2.2-dev I get results which are closer to those that you consider correct. The Proj.4 version in that build is proj-4.8.

gdaltransform -s_srs epsg:31466 -t_srs epsg:4326
2944378 5705784
12.3756178459526 51.3128099490148 44.7304746098816

I suggest you to check which version your library is and update if it is older as the first step.

You should also find out what is your reference implementation so that others can evaluate if that is something that is known to be good for your area (Germany?).

Oracle Spatial – How to Change the Coordinate Transformation Function in Oracle

Search for Spatial Developer Guide Chapter 6.9.6 Creating a Transformation Operation

Chapter 6.9.7 contains an example how to change the trans formation based of helmert parameter to ntv2

this is the current link for Release 18

Best Answer

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[GIS] Accurate Transformation of Gauss Kruger to WGS84 and ETRS89 using PROJ.4

Oracle Spatial – How to Change the Coordinate Transformation Function in Oracle

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